The problem with goggle straps is that they put all the pressure in one place. Crowbar is engineered with outriggers that distribute it evenly & added Silicone backing keeps the strap in place. Triplelayer fleece face foam maintains comfort while wicking away sweat. The lightweight & flexible O Matter frame is combined with optically pure Plutonite lens material to achieve impact protection while filtering out 100 of harmful UV rays. The extended lens size is shaped with curvature that extends your peripheral & downward view & the patented innovations of High Definition Optics maintains startling clarity at every angle of vision. Even the best optics on the mountain are useless if fog buildup corrupts your view so the lens in this performance goggle is enhanced with a permanent specially formulated antifog treatment. High intensity yellow lense rate of transmission 81. Ideal for overcastfoggy or blizzard conditions.