They're great for cystic pimples, I got them as an emergency measure, because sometimes i tend to get red, inflamed cysts on the worst occasions.

They work really really good, and to the person that compared them to the cosrx ones, they're supposed to be totally different. cosrx ones are for popped whiteheads and to absorb sebum and pus, whereas these ones are for when you want to get rid of the pimple before it pops. great for nightime.

side note: these come with two layers of plastic you're supposed to take off before using. a white ring and a clear semi hard thing. they should feel soft on the skin when applied.