Sterile patch to the skin. patch size of 83 mm x 25 mm, in multiples of 20 patches. It has a very subtle, but the waterproof base coat flesh color with a strong glue. Do not drive down the skin with active walking, stoically withstands shower. And it is not noticeable on the skin. Unstuck when a small effort, but painless. Best of all patch tested. I advise you, do not be disappointed.