AMBUSH, Snow Flexible O-Matter chassis Balanced fit (with or without a helmet) via articulating O Matter® strap clips All day comfort of moisture wicking triple-layer polar fleece foam Fog elimination of dual vented lenses with F2 anti-fog technology Lexan® lens material provides 100% protection against UVA, UVB, UVC & harmful blue light Tuned light transmission of Iridium® lens coating (optional) Optimized for small to medium faces IRD = Iridium POL = Polished POLR = Polarized PERS = Persimmon