Bolle Athlete Signature Series Gravity Goggles P80+ Anti Fog disperses water molecules across the surface of the inner lens, restricting moisture build up that can impede a clear view Modulator Lens that changes instantly with the light guaranteeing optimum visibility throughout the day Spherical lens allowing for wide field of view ensures maximum peripheral vision Equalizer Vent is waterproof and breathable technology that delivers a fog-free view Fits medium/large