This was one of the first masks I ever tried. It came with clear instructions and was easy to apply. I left it on for 20 minutes (although the instructions suggest leaving it on from anywhere between 15 and 20 minutes). The mask feels cool and gentle on the skin. Once I took the mask off, there was a bit of residue on my skin, but it washed off very easily! My face felt so clean after using this mask - I would definitely recommend for those with oily skin.