I use these after dermarolling. I can't say that I have noticed much effect from them, but at the very least I'll say that (1) it comes with lots of product and the sheet itself seems well-made, (2) the fragrance and feel is pleasant, and (3) even after dermarolling when the skin is pretty sensitive, I haven't had any problems at all with these masks burning or stinging my skin - they also don't leave any redness.