This is the Promate Super Sonic 2 Lens Adjustable Snorkeling Scuba Diving Mask Features: Newly designed easy adjust buckle system with push button adjustment and all direction swivel functions Extra wide and long lenses provide wider peripheral view and downward vision Ideal for medium faces - face seal size W4 1/2 * H3 1/4 Crystal, liquid silicone injected skirt and strap Double edge comfort seal Ultra Low volume Tempered glasses This Quality Scuba Diving Mask is a fantastic state of the art mask which is ideal for comfort and performance! Good for scuba diving and/or snorkeling.