FEATURES Anti-Fogging Design - Fresh air lows in from the top of the mask and through one way valves Advanced Design Dry Tip - Prevents any water entering the tube when mask is underwater Polycarbonate Mask- Impact resistant, light, and super strong Purge Valve - Allows easy clearance of any water that does not enter the mask Non-Allergenic Silicone Skirt - The ultimate in comfort and tight seal to prevent water leakage Soft Adjustable Straps - Holds the mask in place comfortably, preventing unwanted movement. Won't pull on your hair or skin Sealed Vents - Expelled air flows in sealed vents up the side of the mask and out again CE Approval Highest breathable volume Lowest CO2 Retention Wide, clear vision Incredible 180° viewing range Anti fogging design