Bolle X-9 OTG Goggle Goggles offer aggressive styling and are designed to ride at altitude, with fit that fits over most prescription glasses Flow-Tech Venting designed to reduce fogging and optimize flow of air over inside of lens; venting ports control airflow, while preventing clogging from snow and ice Unique double lens design creates thermal barrier while providing clear optics and superior seal P80 Plus/Carbo GLAS (anti-fog/anti-scratch) coating provides protection against unwanted lens fogging and most scratching Includes limited one-year manufacturer's warranty