COSRX The Alpha-Arbutin Discoloration Care Hydrogel Mask

COSRX The Alpha-Arbutin Discoloration Care Hydrogel Mask is a brightening-focused hydrogel that turns transparent on the face as it works. Alpha-Arbutin and low-molecular-weight collagen do the heavy lifting, and the clear-going mask is your cue that it's finished delivering.

Best for	Dark spots, uneven tone, dull skin
Format	Hydrogel sheet — turns transparent as it delivers
Wear time	2–3 hours, or overnight
Key actives	Alpha-Arbutin · low-molecular-weight collagen

What it actually does

• Delivers Alpha-Arbutin over hours, not minutes. The hydrogel slowly releases actives into the skin and goes clear as it empties, which is why the wear time is measured in hours.
• Targets dark spots and blemish marks. COSRX says it helps reduce how visible blemishes and hyperpigmentation are, for a more even-toned result.
• Pushes brightness and glow. Brighter, glowier skin is the headline claim, alongside more even tone.
• Smooths and refines. The brand also lists smoother-feeling skin and visibly reduced pores among the benefits.
• Built to be gentle. COSRX positions it for people who want brightening without a harsh, irritating routine.

How to use

1. Cleanse, then apply your toner or serum as usual.
2. Open the pouch, peel off the films, and settle the mask onto the face.
3. Wait 2–3 hours, or until the mask has gone transparent — that's the signal it's done.
4. Take it off and massage the leftover essence in rather than rinsing it away.

COSRX tip: wearing it as an overnight treatment is where the brand expects the best results. Use the mask right after opening the pouch, since it can dry out. External use only — keep it out of the eyes, and rinse thoroughly with water if it makes contact.

Is it right for you?

Questions

Why does it turn clear?

The hydrogel goes transparent as it releases its actives into the skin. It's a built-in timer — once it's clear, the mask has delivered what it had.

Can I sleep in it?

COSRX recommends exactly that — overnight use is where the brand says you can expect better results.

Do I rinse afterwards?

No. Peel it off and massage whatever essence is left on the face until it absorbs.

How long does delivery take?

Delivery takes 3 to 21 working days, depending on availability.

How can I pay?

Credit card, debit card, Instapay and mobile wallets — no cash on delivery.

What if the pouch arrives torn or dried out?

Tell us within 1 day of delivery with a photo. Returns cover defective, damaged or expired items only, and refunds are issued to the original payment method within 15–30 days.