IST MP110 Frameless Dive Mask, Single Panoramic Shatterproof Lens for Scuba Diving & Snorkeling LIGHTWEIGHT DESIGN  Frameless construction fits various facial profiles. WATERTIGHT LENS  Dual-edge layer around the lens keeps water out. HYPOALLERGENIC  Flexible liquid silicone is safe for sensitive skin. SHATTERPROOF  Tempered glass lens provides crystal clear vision and is extra durable. COMPACT TRAVEL  Buckles attach to skirt, allowing mask to fold flat for easy packing.