Delivering a comfortable fit without the pressure, the Bolle Z5 OTG Ski Goggle is perfect for skiers and snowboarders who wear prescription glasses and want to enjoy the view from the top. Embedded premium anti-fog layer in the inner lens disperses water molecules across the surface of the lens, restricting moisture build up that can impede your crystal clear view of the terrain ahead A high-tech protective armor applied to the outer lens creates a shield to significantly reduce scratching, keeping your lenses and outlook as clear as a bluebird sky Creation of a dual-pane thermal barrier between the cold dry outside air and the moisture generated by intense activity prevents distracting condensation from forming Engineered venting system promotes directional airflow across the inside surface of the lens, reducing the potential for moisture build-up and maintaining your pristine vision Bolle helmets and goggles are developed in parallel to ensure perfect fit, optimal ventilation and best-possible comfort Siliconized strap helps provide total support for the goggle on the helmet Bolle lens block harmful UVA/UVB rays up to 400 nanometers