Body Glove Professional Scope Purge Silicone Diving Mask with QAS Strap Nose pocket purge valvae for easy clearing and equalization Patented QAS provised fast and easy mask strap adjustments, and includes a soft, comfortable pad that eliminates the discomfort associated with the mask strap tugging or tangling hair High quality silicone facial skirt for comfort Tempered glass lens that meet the most rigourous ANSI standards