JetPilot Body Glove Adult Vapor Pro Fins Set Snorkel Mask Tempered glass lens meets all ANSI standards. Low interior volume design for expanded view. Frameless black liquid silicone facial skirt and strap provides soft and comfortable fit. High efficiency channel system designed to maximize thrust and minimize fatique. Flexible ribbing system for flexibility and minimize fatigue. Quick release buckle allow foot straps to be taken off easily. Submersible dry to prevent water entering into the tube. Silicone patterned mouthpiece for extra comfort. Available in S/M (4.5-8.5), L/XL (9-13)