Each Wiley X lens is made from the world's most impact resistant lens materials. They far exceed the ANSI Z87.1 safety and ANSI Z80.3 optical standards. All lenses feature a resilient scratch resistant hard coat and all frames are made with nearly unbreakable TR-90. The Airborne sunglasses are part of the Climate Control Series from Wiley X and feature a removable facial cavity that locks onto the frames to seal your eyes from outside elements.