Our original PDL Empire Acne Patch. Invisible strong adhesive (Hydrocolloid) With 50% more power than other brands -Simply stick on at night and wake up to clearer skin. You should not necessarily use it at night since it takes on the color and shape of your skin with total transparency. -Strong adhesive: strong enough to last up to 6-10 hours(no more than 10 hours), easy to remove without redness or irritation , you will forget you are wearing the patch -Our hydrocolloid acne patches are UV sterilized, totally safe for your skin Each box comes with 36 patches on easy peel sheets.