COSRX Clear Fit Master Patch is an ultra-thin hydrocolloid acne patch designed for daytime use. With its matt, gradient finish, it's nearly invisible on skin and can be worn under makeup. Each pack contains 18 patches that effectively extract impurities while protecting troubled areas from bacteria. The patches are made with specialized hydrocolloid material (Somadermspot-S) that creates an optimal moist environment for faster healing. They should be applied to clean, dry skin before other skincare products. The patches contain ingredients like petroleum resin, cellulose gum, styrene isoprene styrene block copolymer, polyurethane film, polyisobutylene, liquid paraffin, and tetrakis methane.