What is the difference between HILO WAVE and filler?

Both are hyaluronic acid, but they differ in cross-linking — how tightly the molecules are tied to one another. Filler is tied densely, so it stays as a mass and props up a shape. HILO WAVE is mostly untied material, so it spreads out broadly and settles in. They are not treatments for the same purpose. If you come in expecting as much change as filler gives where a contour has to be clearly defined, you may be left wanting.

I was told it is a skin booster. Why is it put into the cheek?

Skin booster was simply the name it was given at launch. Its Korean licence is as a Class 4 tissue-repair biomaterial, and the injection layer written on it is the subcutis. That is a different layer altogether from the skin boosters placed shallowly in the dermis over many passes. The manufacturer also split the line in July 2026, separating the shallow dermal use into its own product and redefining the original one toward natural volume.

How does it differ from collagen stimulators like Sculptra or Juvelook Volume?

A collagen stimulator works by prompting your own tissue to respond and make collagen, so the change takes time to come up and it is given in several sessions spaced apart. With HILO WAVE the change is physical — hyaluronic acid taking up space — so it shows from the moment it goes in. In exchange, collagen stimulators last longer and are better at raising the thickness of a whole broad area evenly. Which one fits is decided by the area and the time you have left rather than by the product, so we settle it together in the consulting room.

Is it given with a needle or a cannula?

It depends on the area and how much ground we are covering. Even with a needle, it is not dozens of shallow pricks but a small number of points placed deep. For a broad area that has to be covered evenly, such as the lateral or anterior cheek, we usually pass a blunt-tipped cannula horizontally through the fat layer and lay the material down in a long line. That brings the entry point down to one, which also reduces the number of places a mark can sit.

How long does it last?

To be straightforward with you, there is no data yet measuring how long this product lasts in people. What can be confirmed at present is that the manufacturer recommends a three-month interval between treatments. In the clinic we describe cases where something remains for around six months, but this varies widely between individuals. Compared with filler and collagen stimulators, it lasts the shortest of the three, and it is better to know that before you choose.

Will it be obvious right after the treatment?

A red dot can be left where the needle went in, but it does not last long. Bruising varies between individuals — some people do not get it, and when it does appear it usually settles within a week. Because hyaluronic acid draws water in, the area can look fuller than usual for two or three days. Filler follows a similar course.

My wedding is about two months away. Can I have it now?

On timing alone, that is a workable window. That said, you do not have to do something just because an event is coming, and doing nothing is always on the table alongside the rest. If you decide to go ahead, we suggest at least two weeks before the event, and about a month if you can manage it. That covers the time for swelling to go down and the material to settle, plus room to look once and adjust.

Will my face look bigger or puffy?

The aim in this area is not to add volume but to make up the volume that used to support it. The lateral and anterior cheek show the slightest clumping, so putting a lot in cannot really be the goal. That said, for two or three days after the injection the area can look fuller as it draws water in, and you should not take how it looks then as the final result. How much and how wide depends on your skeletal structure and how much has been lost, so we agree on the goal before the first treatment.

Can it be reversed if I do not like it?

It is a hyaluronic acid product, so in principle a dissolving enzyme can be considered. That said, most of this product is not cross-linked, so it is closer to something that fades naturally over time, and whether to actually use the enzyme is judged by looking at the situation directly. In any case, setting the goal and the extent precisely before treatment comes first.

I am having skin booster injections and Rejuran. Can I have this as well?

They work in different layers, so their purposes do not overlap. Skin boosters and Rejuran work on the dermis, while HILO WAVE makes up volume in a deeper layer. That said, several injectable treatments overlapping in the same area at short intervals can add swelling and bruising together, so we set the order and the spacing separately. Telling us what you have had recently at the consultation makes the plan easier to build.

HILO WAVE — Filler or Collagen Stimulator?

People who come in because a hollow lateral cheek makes their face look shadowed have usually looked into two things already: filler, and collagen stimulators. But there is a situation in the clinic where both of those become awkward. Filler gives you pause because it might show, and there is not enough time left to wait for the body to respond to a collagen stimulator. This article is about the one product that sits in that gap, HILO WAVE, and exactly what role it takes on.

Three-Line Summary

HILO WAVE holds two non-cross-linked hyaluronic acids and one lightly cross-linked complex in a single syringe. By composition it sits between filler and skin boosters, but when you are choosing something to fill a hollow, it sits between filler and collagen stimulators.
The change is physical — hyaluronic acid taking up space — so you see it from the moment it goes in. There is no waiting for tissue to respond the way there is with a collagen stimulator, and because the material spreads out broadly, it tends to leave less of an edge than filler.
In exchange, it has little power to build shape and it lasts the shortest of the three. If you need a defined contour, filler fits. If you have time and want results that hold longer, a collagen stimulator fits. The situation decides this, not the product.

Why the Lateral and Anterior Cheek Empty First

Before we talk about products, let us look at why those particular areas hollow. The reason for keeping that order is simple. Where is empty and why has to be settled before what goes in and how much, because that is what gives a product choice its criteria.

Facial fat is not one single mass

The fat under the skin of the face is not one continuous sheet. It is divided into compartments. A cadaver dissection study published in Plastic and Reconstructive Surgery in 2007 reported that facial subcutaneous fat separates into independent compartments. To put the authors' conclusion plainly, the face does not age as one block. Each compartment shrinks at its own pace, which means some empty before others.

The compartments around the lateral and anterior cheek are among the ones that show relatively early. When the volume supporting them from below shrinks, the skin above settles down and a shadow forms, and it stands out more in photographs than in the mirror. The more the light falls from above, the more so.

Bone plays its part

A CT study published in the same journal that year reported that the angle of the maxilla decreases with age. In plain terms, the bone that was propping things up retreats inward. That is how a face can come to look shadowed without any weight loss.

External factors layer onto this. Weight change is one, and so is masseter botulinum toxin, after which the chewing muscle shrinks and the hollow in the lateral cheek stands out more by comparison. Where the cheekbones are prominent to begin with, the same degree of loss tends to be more noticeable.

So hollowing in the lateral and anterior cheek is usually compartment-by-compartment fat loss and skeletal change combined. That is why, when choosing a treatment that fills, we first check which layer is empty and whether we are dealing with a broad surface or a narrow point.

What Hyaluronic Acid Does Inside the Skin

On to the material. Hyaluronic acid is a substance already present in our skin. Its job is to pull water in and hold onto it.

Inject it and two things happen. It takes up space where it lands, and at the same time it draws in the water around it. The material settles in and the area around it becomes more hydrated. That is why you can see it from the moment it goes in. It does not work by waiting for the body to build something new, the way a collagen stimulator does.

Put it in as it is, though, and it breaks down within a day or two. The body already knows the substance, so it clears it away. Making it last means treating it somehow — and how you treat it turns it into an entirely different treatment.

Cross-linking — tying knots between the threads

This treatment for making it last is called cross-linking. Picture laying out a number of threads and tying knots between them here and there. Knotted, they do not come apart easily, so they last.

Tie the knots densely — the bundle becomes firm and holds its shape under pressure. That is filler. It stays as a mass and props a shape up.
Tie no knots at all — that is non-cross-linked hyaluronic acid. The threads simply disperse in water. The products usually called skin boosters belong here, spread across the shallow layer in many separate points to work on skin texture and hydration.
Tie only a few knots — it does not clump into a mass, but it does not scatter quickly either. It spreads out broadly and settles.

The ingredient is the same hyaluronic acid, yet how many knots were tied makes a completely different treatment. The product in this article is closest to the third box.

Where HILO WAVE Sits Between Them

HILO WAVE comes not in an ampoule or a vial but in a single 2.0 mL syringe, holding 48 mg of hyaluronic acid. By concentration that is 24 mg per millilitre. Those 48 mg, though, are not filled with one kind of hyaluronic acid.

Three things inside one syringe

High-molecular-weight non-cross-linked hyaluronic acid — long threads with no knots tied. It takes on the job of supporting tissue.
Low-molecular-weight non-cross-linked hyaluronic acid — short threads with no knots tied. It draws water in quickly.
Micro-cross-linked hybrid complex — a bundle with knots tied here and there. It is the part that stays in place comparatively longer.

Dual-HA is the name for that make-up. It means large molecules and small molecules held together, with one further component mixed in: a lightly cross-linked complex. It is not cross-linked material put in whole, and it is not a skin booster simply made denser. The part you see immediately and the part that stays put, mixed into one syringe — understand it that way and you will not be far off.

By concentration it is clearly denser than a skin booster sprinkled into the shallow layer. It is also not as dense as a filler built to prop a cheek up. Because it lands cleanly on neither side, many people describe it as sitting between filler and skin boosters.

Named a skin booster, licensed as a tissue-repair biomaterial

When it came out at the end of 2024 it was indeed introduced under the name skin booster, but its Korean licence is as a Class 4 tissue-repair biomaterial. That is the same category as filler. The injection layer written on it is the subcutis. That is a different layer altogether from booster products placed shallowly in the dermis.

That mismatch eventually led to the product line itself being sorted out. In July 2026 the manufacturer split the line in two, separating the shallow dermal use into its own product and redefining the original one toward natural volume. So texture and hydration are not what to look for from this product.

We are sometimes asked whether it is the same as other non-cross-linked hyaluronic acid products. Holding both large and small molecules, and sharing the 2 mL format, probably makes them look alike. But unlike products whose instructions state that no chemical cross-linking agent was used at all, the first words on this product's licence are cross-linked hyaluronic acid. The starting points differ.

So it comes to this. By composition it is between filler and skin boosters, but when you are choosing, it is between filler and collagen stimulators. What something is made of and when it is used are separate questions. When a cheek has hollowed, what actually goes on the scales beside this product is not skin boosters but filler and collagen stimulators. All three fill a hollow.

Filler, Collagen Stimulators and HILO WAVE on the Same Scales

Set the three side by side and it becomes fairly clear what each one gains and what it gives up.

Against filler — what this one does better is the edge

Filler sets a shape the moment it goes in, but it sits there as a mass, so depending on the site it can show. You can feel the difference too. The border between where it was placed and where it was not can catch under your fingertips, and that is usually what people mean when they say something feels like a foreign body.

HILO WAVE has only a few knots tied, so it does not clump. It lays down broadly, as though seeping in, and less of that border forms. It behaves less like a single mass moving around and more like something blending into the surrounding tissue. In exchange, it has handed the shape-building job over to filler.

Against collagen stimulators — what this one does better is time

Collagen stimulators such as Sculptra (PLLA), Juvelook Volume (PDLLA), Radiesse (CaHA) and GOURI, a liquid PCL product, work by prompting your own body to make collagen. The change takes weeks to months to come up, and they are given in several sessions spaced apart. In exchange they last longer, and they are better at raising the thickness of a whole broad area evenly.

The result has a different character as well. Tissue formed by a collagen stimulator can feel firm to the touch, and rarely it leads to a nodule. And it is hard to fine-tune. It does not fill exactly as much as you put in; it comes up as much as the body responds, so how much will form is hard to set in advance. It also calls for caution where the skin is thin, because even slight clumping shows through the surface.

Hyaluronic acid products, on the other hand — filler or HILO WAVE — give volume equal to what goes in, so the amount is controllable. Narrow sites and shallow sites can be handled. That is why HILO WAVE suits an area like the lateral cheek, which is broad and must not show.

Category	Filler	Collagen stimulator	HILO WAVE (Dual-HA)
When the change shows	Immediately after injection	Weeks to months later	Immediately after injection
How it works	Cross-linked gel takes up space as a mass	Prompts tissue to make its own collagen	Hyaluronic acid takes up volume and draws water in
Power to build shape	Relatively strong	Moderate — though the final shape is hard to predict	Relatively weak
Edge and foreign-body feel	Can catch under the fingertips depending on the site	Can feel firm, rarely a nodule	Tends to form less
Control over amount	Volume equals what goes in	As much as the body responds, so hard to control	Volume equals what goes in
Sessions	Usually one, topped up when it fades	Several, spaced apart	Usually one, then decided by how it settles
How long it tends to hold	The longest of the three	Moderate	The shortest of the three

Read the table alone and it is easy to take one of them as superior, but that is not how it works. A situation where it has to show immediately and show up as little as possible — that is exactly where HILO WAVE sits. Conversely, if you have time and want results that hold longer, a collagen stimulator fits, and if you need a defined contour, filler fits.

Which Layer, and With Which Tool

Even with the same product, the tool and the layer change with what you are aiming at. That is especially true here.

A few points, placed deep

The technique the manufacturer put forward early on is called PDIT (Point Deep Inject Technique). Instead of dozens of shallow pricks, it means placing the material deep at a small number of points. Deep here means below the dermis. The injection layer on the licence is the subcutis, and the manufacturer also describes the treatment field for this product as running from below the dermis into the superficial subcutaneous layer.

Since the skin boosters people know go into the dermis with dozens of shallow pricks, the layer itself is different. Even with the same hyaluronic acid, what it does depends on the layer it is placed in.

Why a cannula is used for a broad area

There is one more approach here, using a cannula. A blunt tube with a closed tip goes in at one point and is pushed horizontally through the fat layer, parallel to the surface of the skin, laying the material down in a long line along the path it has travelled. Filler and collagen stimulators use this approach too, and for a broad area such as the lateral or anterior cheek it is usually the one we take. There are three reasons.

The distribution differs — place it deep at a few points with a needle and the gel gathers at each of those points. Pass horizontally with a cannula and it lays down in a long line. Where a broad area has to be covered evenly, the latter has the advantage.
Less of an edge forms — material gathered at points leaves room for that one spot to bulge, and laying it in a line reduces that. The very reason for using this product is to avoid leaving an edge, so the method and the purpose line up.
One entry point is enough — there is no need to puncture in several places, so there are fewer places for a bruise or a red mark to sit. For someone who has come in ahead of an event, that difference matters a good deal.

It is worth adding that studies comparing the rate of vascular complications between needles and cannulas have been reported. Choosing the tool is not only a question of distribution and edges; safety is weighed alongside. That said, a needle is a better fit in some cases depending on the site, the extent and the state of the tissue, so what we use is settled after the examination.

What This Product Cannot Do

It would not be fair to give you the advantages alone. This product has two clear limits.

It has little power to build shape

That follows from only part of the contents being knotted. If you are after a clearly defined, strong contour, this product may leave you wanting. Other treatments suit that purpose.

It lasts the shortest of the three

The numbers make the difference clear.

Filler — an MRI study published in Plastic and Reconstructive Surgery Global Open in 2024 imaged 33 people who had had filler in the midface, and not one of them had it disappear completely within two years. Cases detected as far out as 15 years have been reported. It varies by site.
Collagen stimulators — a systematic review published in Aesthetic Plastic Surgery in 2026 put PLLA products at up to 25 months and CaHA products at 12 to 18 months.
HILO WAVE — there is no data at all measuring how long it lasts in people. What can be confirmed at present is only that the manufacturer recommends a three-month interval between treatments. In the clinic we describe cases where something remains for around six months, but this varies widely between individuals.

There is one more thing to be clear about. The research cited in connection with this product is preclinical work in cells and animals, not clinical trials in people. What we can say may change as further research comes in.

On the numbers alone, this product is the shortest of the three. And that short duration grows from the same root as the advantages described above. Because few knots were tied, it spreads broadly and leaves less of an edge — and the body clears it faster in return. An account in which something holds for a long time, causes no trouble and brings only benefit does not stand up for any product. Every product gives something up in exchange for what it gains.

Planning the Timing Around an Event

We sometimes ask early in a consultation whether you have anything important coming up soon. If there is a wedding, a meeting between families or a shoot — an occasion that leaves a lot of photographs — the order of the options changes.

Let us be clear first. Having an event does not mean you have to do something. Doing nothing is always on the table alongside the rest. We go over the timing in advance not to hurry you but to avoid squeezing a treatment into a schedule that cannot take it.

From the day of treatment to two weeks

Entry-point marks — with a needle, a red dot can be left at each spot it went in. It does not last long.
Bruising — this varies widely between individuals. It does not happen readily, and when it does it usually settles within a week.
Swelling — it depends on how much went in and where. Since hyaluronic acid draws water in, the area can look fuller than usual for two or three days. Filler follows a similar course.
How it feels to the touch — a slightly raised feeling can remain, and it usually settles in with the surrounding tissue over time.

So when you have an event, we suggest at least two weeks, and about a month if you can manage it. That covers the time for swelling to go down and the material to settle, plus room to look once and adjust. Put the other way round, if the event is a week away, there are cases where we say it is better not to do it this time.

If you have two or three months left

Collagen stimulators need time for your body to respond, so they have to be given in several sessions spaced apart. With only two or three months left, splitting the course and waiting for a response gets tight. That is why HILO WAVE comes up as an option in this window. But that means it is a choice that works at this point in time, not that it is a better treatment. Once the event has passed and there is more time, we discuss other approaches again.

Why we do not follow the interval mechanically

The manufacturer recommends three months between treatments. But we do not tell you to come back simply because three months have passed. We say it is better to treat once, watch it properly, and add more when you start to feel it is missing.

Guidance along the lines of so many sessions a month apart lasting so long is common, but in many cases there is no confirmed evidence behind it. At ABLE Dermatology we do not follow these fixed courses as given for most booster products, HILO WAVE included; we suggest the next treatment when the effect starts to fall short. Sessions, intervals and maintenance points are agreed before the first treatment and adjusted as we watch how things go.

Where ABLE Dermatology Uses Hyaluronic Acid Boosters

We run two products as hyaluronic acid boosters, and their uses are clearly different.

HILO WAVE — for shaping a hollowed area

The site we use it for most is the lateral cheek, then the anterior cheek. If the temple has hollowed along with them, we look at that too. These areas are demanding. Let them hollow and the whole face looks shadowed, yet the slightest clumping shows immediately. You cannot put a lot in, and you cannot leave it alone either. Since a broad area has to be covered evenly, the tendency to spread out broadly helps.

BELOTERO REVIVE — for dry, sensitive skin

BELOTERO REVIVE has a different character from the ingredient list onward. Alongside hyaluronic acid it contains 17.5 mg of glycerol per millilitre. Glycerol holds onto water, so you can read straight from the composition that it was designed for hydration from the start. This is not a matter of how the knots were tied but of adding a component that holds water.

There are clinical results in people as well. Meaningful change was reported in those classified as having dry or very dry skin to begin with, and it was maintained for up to nine months after the last injection. Not everyone showed the same degree of hydration, though, so it is not a product for everybody. We treat with a cannula for people whose skin barrier has broken down and who feel considerable dryness.

Both are hyaluronic acid, but the two products do not overlap. HILO WAVE makes up lost volume; BELOTERO REVIVE works on hydration in dry skin.

Grouped under the word booster, but different families

This is where confusion comes up often in consultations, so let us set it out once.

Hyaluronic acid boosters — HILO WAVE (Dual-HA), BELOTERO REVIVE. They fill volume and water physically.
Collagen stimulators — Sculptra (PLLA), Juvelook Volume (PDLLA), Radiesse (CaHA), GOURI (liquid PCL). They prompt your own collagen production.
hADM (ECM) boosters — Re2O, CellREDM. They reinforce the matrix of the dermis itself, which is different again from the two families above.

They are all called boosters, but they act differently, so the product name comes up only once the family has been settled. Reverse that order and the basis for the choice blurs.

When we suggest HILO WAVE

When the lateral or anterior cheek has hollowed and the face looks shadowed — this includes cases where the temple has hollowed as well.
When a broad area has to be covered evenly — an area where one spot standing out looks off instead.
When you have looked into filler but hesitate in case it shows — particularly ahead of an occasion that leaves a lot of photographs.
When there is not enough time to split the course and wait for a response — a situation with two or three months left.

And when we suggest something else

When you want a clearly defined contour — filler fits. This product may leave you wanting.
When you have time and want results that hold longer — collagen stimulators are the better fit.
When skin texture and hydration are the main concern — that is not the layer this product works in. We look separately at boosters that work on the dermis.

Cases we sort out before proceeding

Active infection or inflammation at the treatment site
Pregnancy or breastfeeding
A recent injectable treatment in the same area, where the interval needs adjusting
A history of allergy to hyaluronic acid, or ongoing treatment for an autoimmune condition
A tendency to bruise or bleed, such as from anticoagulant use — we adjust the timing and the method

After a hyaluronic acid injection, bruising, swelling, tenderness, redness and temporary nodules can occur, and this varies between individuals. Vascular complications are rarely reported, so the injection layer and the tool are chosen carefully. Telling us your medical history and previous treatments accurately at the consultation lets us plan more safely.

One last thing. If you are weighing up a treatment, it helps far more to come in having worked out where on your own face bothers you and why than to look up which product to have first. This is not a question of which of the three is the better product but of where your own situation catches. The rest we can work out together in the consulting room.

From Consultation to Treatment

A board-certified dermatologist examines you, identifies the layer behind the change, sets the device and parameters, and the same dermatologist carries out the treatment. Treatments are not recommended by a non-medical consultant.

Sessions, intervals, maintenance points and cost are agreed before the first treatment.

Frequently Asked Questions

I am having skin booster injections and Rejuran. Can I have this as well?: They work in different layers, so their purposes do not overlap. Skin boosters and Rejuran work on the dermis, while HILO WAVE makes up volume in a deeper layer. That said, several injectable treatments overlapping in the same area at short intervals can add swelling and bruising together, so we set the order and the spacing separately. Telling us what you have had recently at the consultation makes the plan easier to build.
Can it be reversed if I do not like it?: It is a hyaluronic acid product, so in principle a dissolving enzyme can be considered. That said, most of this product is not cross-linked, so it is closer to something that fades naturally over time, and whether to actually use the enzyme is judged by looking at the situation directly. In any case, setting the goal and the extent precisely before treatment comes first.
Will my face look bigger or puffy?: The aim in this area is not to add volume but to make up the volume that used to support it. The lateral and anterior cheek show the slightest clumping, so putting a lot in cannot really be the goal. That said, for two or three days after the injection the area can look fuller as it draws water in, and you should not take how it looks then as the final result. How much and how wide depends on your skeletal structure and how much has been lost, so we agree on the goal before the first treatment.
How many sessions do I need? Do I have to keep coming every three months?: We do not recommend another session mechanically just because three months have passed. We say it is better to treat once, watch it properly, and add more when you start to feel it is missing. Guidance along the lines of so many sessions a month apart lasting so long is not an approach with confirmed evidence behind it, so we do not follow it as given. Sessions and intervals are agreed before the first treatment and adjusted as we watch how things go.
My wedding is about two months away. Can I have it now?: On timing alone, that is a workable window. That said, you do not have to do something just because an event is coming, and doing nothing is always on the table alongside the rest. If you decide to go ahead, we suggest at least two weeks before the event, and about a month if you can manage it. That covers the time for swelling to go down and the material to settle, plus room to look once and adjust.
Will it be obvious right after the treatment?: A red dot can be left where the needle went in, but it does not last long. Bruising varies between individuals — some people do not get it, and when it does appear it usually settles within a week. Because hyaluronic acid draws water in, the area can look fuller than usual for two or three days. Filler follows a similar course.
How long does it last?: To be straightforward with you, there is no data yet measuring how long this product lasts in people. What can be confirmed at present is that the manufacturer recommends a three-month interval between treatments. In the clinic we describe cases where something remains for around six months, but this varies widely between individuals. Compared with filler and collagen stimulators, it lasts the shortest of the three, and it is better to know that before you choose.
Is it given with a needle or a cannula?: It depends on the area and how much ground we are covering. Even with a needle, it is not dozens of shallow pricks but a small number of points placed deep. For a broad area that has to be covered evenly, such as the lateral or anterior cheek, we usually pass a blunt-tipped cannula horizontally through the fat layer and lay the material down in a long line. That brings the entry point down to one, which also reduces the number of places a mark can sit.
How does it differ from collagen stimulators like Sculptra or Juvelook Volume?: A collagen stimulator works by prompting your own tissue to respond and make collagen, so the change takes time to come up and it is given in several sessions spaced apart. With HILO WAVE the change is physical — hyaluronic acid taking up space — so it shows from the moment it goes in. In exchange, collagen stimulators last longer and are better at raising the thickness of a whole broad area evenly. Which one fits is decided by the area and the time you have left rather than by the product, so we settle it together in the consulting room.
I was told it is a skin booster. Why is it put into the cheek?: Skin booster was simply the name it was given at launch. Its Korean licence is as a Class 4 tissue-repair biomaterial, and the injection layer written on it is the subcutis. That is a different layer altogether from the skin boosters placed shallowly in the dermis over many passes. The manufacturer also split the line in July 2026, separating the shallow dermal use into its own product and redefining the original one toward natural volume.
What is the difference between HILO WAVE and filler?: Both are hyaluronic acid, but they differ in cross-linking — how tightly the molecules are tied to one another. Filler is tied densely, so it stays as a mass and props up a shape. HILO WAVE is mostly untied material, so it spreads out broadly and settles in. They are not treatments for the same purpose. If you come in expecting as much change as filler gives where a contour has to be clearly defined, you may be left wanting.

HILO WAVE — Where This Product Sits Between Filler and Collagen Stimulators