Polarized lenses enhance your vision and make it more fun to be outside from sunrise to sunset. The Tera comes with low VLT lenses designed to reduce glare from water or snow, so you can see nature clearly. Protect your eyes from glare with magnetic, removable sun shields. Easily pop the sun shields in or out as conditions change throughout the day. Ultralight construction makes the Tera a comfortable choice for all day activity, whether you're summiting a mountain or hanging out lakeside.Their SuperLight Recycled Frames are also good for the planet.