This is the Aqua Lung Maui Scuba Diving Snorkeling Mask Features: Large, single lens design puts a premium on function over fashion, with excellent visibility in all directions Simple strap and buckle system securely locks strap adjustments into place High-grade silicone material allows the facial skirt to flex and naturally mold around facial contours for a leak-free seal Shatterproof, tempered glass lens suitable for diving and snorkeling meets ANSI standards If you dive with a machine gun (or want to look like you do), the Maui is for you! A popular choice for military and professional divers, this rugged, utilitarian mask gets the job done with a large single lens, stealthy black silicone skirt and rugged build. "