The Smith I/OX Snow Goggles are the biggest, baddest, goggle in the interchangeable family, equipped with the largest spherical lens possible. Featuring 5X Anti-Fog technology, unparalleled peripheral vision, easy interchangeability, and perfect helmet integration. The Blackout (10% VLT) is a S3 Category lens with a dark gray base lens tint that cuts glare and reduces eye fatigue in bright, sunny conditions. This model also includes a Red Sensor Mirror (60% VLT) is a S1 Category lens with a light rose base lens tint with a multi-layer red mirror that maximizes color definition and increases depth perception in varying levels of flat light conditions. All lenses provide 100% protection from harmful UVA/B/C rays.