COSRX
Master Patch Original Fit
Overnight hydrocolloid patches that absorb fluid and shield the blemish while you sleep, in a thin film that stays put.
No reviews yet- Ships from our California warehouse
- Duties prepaid
- Suited to
- NormalCombinationDry
- Helps with
- Shoppers who want the full Master Patch Original Fit assembled as one purchase instead of sourcing each item on its ownConsistent use across every piece in the set, since a multi-step routine compounds over weeks of use rather than showing a result from one application
Sold out.
Tell us where to send it
One email, the moment this exact unit is back in stock. Not a newsletter and not a sequence, and your address comes off the list the second it is sent.
- Duties prepaid
- 30-day returns
- Free US shipping on orders of $100 or more
- Dispatched within 2 business days
Key benefits
- Hydrocolloid absorbs fluid overnight and turns visibly white as it works
- The film keeps pillowcases, fingers and grime off the spot
- A short material list with nothing to sensitize surrounding skin
- Stays adhered through a full night's sleep
Key actives
Cellulose Gum
the absorbent core of the hydrocolloid dressing
How to use
- Press one Master Patch Original Fit onto clean, dry skin at the end of the evening routine.
- Dry the spot completely first, then press the patch from the middle outward so the edges sit flat.
- Leave it on overnight and take it off in the morning; put a fresh one on the next evening if it is wanted.
- One patch per spot per night. Do not apply one over a serum or a cream, and do not put one on broken skin.
COSRX Master Patch Original Fit
What's in the Master Patch Original Fit and what's it for?
This is a hydrocolloid film patch built on cellulose gum and a styrene isoprene styrene block copolymer, with polyisobutylene, petroleum resin, polyurethane film and liquid paraffin rounding out the seven-entry material list. It comes in multiple sizes to fit differently sized spots. The patch functions purely as an absorbent dressing, with no separately named active ingredient added on top.
Is this patch suitable for skin that reacts to adhesives?
Fragrance, essential oil, denatured alcohol, silicone, parabens, sulfate surfactants, mineral oil and added colourant are all absent from this list. The film itself is built on petroleum resin, liquid paraffin and polyurethane film, which are common patch-adhesive materials rather than skincare actives, so there's nothing added here beyond the dressing material itself. Anyone who reacts to adhesive bandages in general should watch for the same response here.
How long does it take to see the patch working?
The film absorbs fluid from the spot underneath it gradually, turning visibly white or cloudy as it fills over the hours it's worn. That change in color is the sign it's drawing fluid out, not a sign the blemish has resolved underneath. Replacing the patch once it's saturated, rather than judging it after a few minutes, is how the absorption is meant to be read.
Can I layer a spot treatment with this patch?
None of the seven ingredients here overlap with a treatment serum, since this patch is purely a dressing rather than a delivery system for actives. Letting a leave-on treatment absorb fully into dry skin before pressing the patch on keeps the film from sliding, since a damp surface won't hold the adhesive as well. Order matters more than which treatment you choose.
How do I verify my Original Fit patches are authentic?
COSRX also runs its own verification, where the batch number and expiration date on your box get entered on the verification page at cosrx.com. That check relies on the codes printed on your own packaging, not on anything a listing states.
- Ships from
- California
Duties are prepaid. Nothing is owed at delivery. Returns are accepted for 30 days, by mail.
Orders ship from our California warehouse, dispatched within 2 business days, and arrive in 3 to 5 days. Shipping is free on orders of $100 or more.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Customs
Duty paid by us before it enters the US - 3California
Ships domestically, no international leg
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Import duties are paid by us before the parcel reaches you, so nothing is owed at the door, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
Payment and security
We accept
How it works
A blemish left uncovered overnight collects on a pillowcase and invites more picking. This film-based patch instead seals over the spot, its polyurethane film and polyisobutylene layer forming a barrier that stays put through movement and sleep. Underneath, cellulose gum draws fluid from the spot into the dressing rather than letting it sit against skin. Over several hours the center turns visibly white or cloudy as it fills. Press the edges down firmly on dry skin so the film holds through a full night.
Reviews
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COSRX, Korean-market original
Overnight hydrocolloid blemish patches, thin film fit.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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