The Smith I/O7 Snow Goggles introduces the next level in rimless interchangeability. Where others have chosen to sacrifice fit, flexibility, and ventilation to incorporate more parts, more weight, and more gimmicks, the I/O 7 is the ultimate in minimalist performance. Single-Pivot Quick Release, AirEvac Integration technology, and Facial Geometry frame design. The I/O 7 forges a new path forward in rimless interchangeability. Seven years ago Smith revolutionized goggles, introducing the first rimless interchangeable goggle to the world. Seven years of innovation. Seven years of domination. 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.