The Shield III sunglasses offer a frameless construction making them lightweight and providing excellent peripheral vision. The lenses themselves are precision crafted of impact resistant polycarbonate and exceed the ANSI Z87.1-2010 standards for high-mass and high-velocity impact protection. This eyewear wraps around the face and has closed cell memory foam to minimize wind disruption and turbulence. Shield III lens is anti-fog coated to ensure visual clarity. Compliance: ANSI Z87.1-2010, CE EN-1836:2005, EN 166 high speed impact at 45m/s in extreme temperatures.