The Smith Women's I/O S Snow Goggles With Green Sol X/Red Sensor Lenses is the compact frame and smaller face fit of the I/OS packs in as much performance as any large fitting goggle. The interchangeable lens system makes switching lenses easy, while 5X anti-fog technology keeps the goggle fog free. Technology is not sacrificed for the small fit you need, so your goggles are tuned for endless powder laps. The Green Sol X Lens has 12% Visible Light Transmission. Dark sienna brown, Sol-X base lens tint with a multi-layer green mirror cuts glare and reduces eye fatigue in bright, sunny conditions. The Red Sensor Lens has 55% Visible Light Transmission. Light rose base lens tint with a multi-layer red sensor mirror maximizes color definition and increases depth perception in varying levels of flat light conditions.