Maximum field of vision and impact protection lens technologies Lens Lock System features four locking pins that go through the lens instead of grabbing it from the top Articulated Polyamide (nylon) outriggers NoSweat 3-layer molded face foam NoFog™ Anti-Fog lens treatment Light Sensitive lenses engage photochromic technology and adapt automatically to sunlight intensity Frame is constructed of soft Thermoplastic urethane (TPU) with UV blockers to help maintain flexibility, even in cold temperatures Polycarbonate lens