Oakley Airbrake (A) Snow Goggles Rigid exoskeleton utilizing Switch lock technology for fast and easy lens changing, with a flexible O Matter faceplate that conforms to your face Rigid O Matter strap outriggers provide balanced fit, with or without a helmet. Fits most helmets Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility Optically correct dual-vented Lens with F3 Anti-fog coating & High Definition Optics (HDO)that maintain startling clarity at every angle of vision Plutonite lens material provides 100% protection againstUVA,UVB,UVCand harmful blue light