Tilos Titanica, Single Lens Oversize Mask for Scuba and Snorkeling, Adult and Junior Size Available Over Size One-Piece Lens: A snorkel mask should help you see better, not obstruct part of your view. Now you can enjoy all the underwater scenery clearly with this wide single lens mask. Anti-fog Tempered Glass 100% High grade silicone with proprietary low-friction double feathered edge skirt surface on fitting Line, super soft and seals perfectly to your face Quick release mask strap buckle system allows you to easily take off the dive mask Junior sizing is perfect for diving and recreational snorkeling for kids or adults with smaller, narrower faces