JetPilot Body Glove Adult Illuminary II Combo Pro Snorkel Mask Tempered glass lens meets all ANSI standards. Low interior volume design for expanded view. Easy-adjust strap clip for easy to adjust and lock the strap. Silicone patterned mouthpiece for extra comfort. Pre-bent flex section reduces jaw fatigue. Liquid silicone facial skirt and strap provides soft and comfortable fit. Purge valve for easy clearing of water from the snorkel. Submersible dry to prevent water entering the tube.