The Bolle Z5 OTG Photochromic Ski Goggle is a cylindrical goggle allowing prescription wearers to benefit from the best of Bolle technologies, such as exceptional ventilation and double density foam. 

• Features photochromic lens which darken on exposure to specific types of light of sufficient intensity, most commonly UV radiation 
• 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
• 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
• 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
• Strategically located channels cut into the foam ensure optical glasses fit perfectly; with pressure virtually eliminated, wearing glasses with goggles no longer feels like a compromise
• Sport Optical System prescription adapter easily snaps into place to provide the corrective vision required while maintaining the wide field of view 
• Siliconized strap helps provide total support for the goggle on the helmet 
• Medium density foam backs up a soft micro-fleece face layer