Oakley Crowbar Snow Goggles Flexible O Matter chassis that conforms to your face and triple-layer fleece foam to seal out the elements and enhance comfort Rigid O Matter strap outriggers provide a balanced fit, with or without a helmet Dual-vented lenses with F3 anti-fog coating for superior fog elimination Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility High Definition Optics (HDO), and 100% protection againstUVA,UVB,UVCand harmful blue light