3D mask blocks 99% of viruses and bacteria, designed to be gentle on the ears for comfortable wear. - Block Rate: 99% block - Type: 3D mask - Features: Doesn't hurt ears, resists makeup transfer, gentle on the skin I opened and used one mask, but the size doesn't fit me. I'm selling the remaining masks to someone who likes them. The remaining 29 masks are individually packaged and unopened, but please refrain from purchasing if you are concerned.