1. Dual-Action Mask For Maximum Results

Each Kosuna mask is two things at once: a serum packed with peptide, low-molecular-weight collagen and hyaluronic acid, and a honeycomb hydrogel sheet that holds that serum flat against the thin skin under your eyes, helping deliver it deeper than a cream you rub in.

In just two weeks, this two-in-one routine, the serum and the sheet working together for 40 minutes at a time, can dramatically reduce dark circles and the shadowed, tired look under your eyes, while your skin keeps holding its hydration between masks.

With consistent use, kosuna helps rebuild the collagen and moisture in thin under-eye skin, so the darkness underneath shows through less and less.

2. Enhanced Collagen Through Combined Delivery

While the clinically studied peptide Acetyl Hexapeptide-8, known as the “Topical Botox” peptide, guides collagen and hyaluronic acid into the skin under your eyes, Centella Asiatica and caviar extract work at the surface to soothe and brighten.

Applying the ingredients is only half the job. On its own, hyaluronic acid and collagen spread across the whole area you put them on. The peptide directs them to the particular spots that need care, rather than leaving them spread evenly across the application area.

This inside-out approach thickens and firms thin under-eye skin more effectively than a cream or a patch alone, so the shadow underneath shows through less, revealing a brighter, more youthful-looking under-eye.

3. Optimised Absorption, Right Where The Shadow Sits

The hydrogel sheet seals the serum against the thin skin under your eyes for 40 minutes, allowing the peptide, collagen and hyaluronic acid to penetrate up to 40% deeper than a cream you rub in.

A cream is like splashing tea into a mug of water and hoping it turns brown. The patch is the tea bag: it sits there and steeps for 40 minutes. You can even watch it work. It goes on milky white and turns clear once it's all gone in.

This enhanced delivery means the skin under your eyes gets the full benefit of every drop of serum, helping erase years of dark circles from within.

4. Accelerated Skin Renewal

Low-molecular-weight collagen is small enough to sink into thin under-eye skin, while the peptide directs it, and the hyaluronic acid with it, to the spots that need it most, giving your skin the building blocks for rapid renewal.

This powerful combination softens dark circles and fine lines faster than a cream or a patch on its own, while the hyaluronic acid keeps the skin under your eyes hydrated between masks for continuous renewal.

5. 24-Hour Dark Circle Prevention Ritual

Use the mask in the evening: the cool hydrogel calms puffiness while the serum floods the thin skin under your eyes for 40 minutes, then pat in what's left to keep your results going through the next day.

Centella Asiatica's soothing botanicals work overnight to calm the skin, while each mask builds on the last, creating a continuous cycle of brightening and de-puffing.

6. A Complete Under-Eye Care System In One Mask

Together, the serum and the sheet give you a complete under-eye routine that works day and night.

The mask cools and relaxes tired eyes for 40 minutes, while Centella Asiatica and caviar extract keep soothing and brightening the skin between masks, for healthier, brighter, younger-looking eyes long-term.