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The Scott Heli OTG goggles deliver quality optics at a great price and are engineered to fit comfortably over a wide range of eyeglasses. Cylindrical dual lens offers distortion-free and optically correct vision. No Fog(TM) lens treatment provides permanent resistance to goggle fogging. Ventilation system uses intake vents on the lens and output vents on the frame to control airflow and prevent fogging. Soft, hypoallergenic foam forms a precise fit around facial features and seals out the elements. Ideal for most light conditions, Amplifier lens offers excellent depth perception and high contrast; allows 30% visible light transmission. The Scott Heli OTG snow goggles fit medium faces.