Polycarbonate lenses are made from premium-grade resin The ToughZone lenses resist scratching, and ESSOPTICS provide distortion-free clarity and 100% UVA/UVB protection Built from extra-thick, 2.4mm polycarbonate ICE replacement lenses are available in Clear, Smoke Gray, Hi-Def Yellow, and Hi-Def Copper These lenses are not compatible with the smaller ICE NARO eyeshield.