ESS Eyepro Crossbow Replacement Lens Made in USA composite frame photochromatic lens non-polarized Lens width: 2.4 The Crossbow's DedBolt Lens Lock system allows for rapid lens interchange The ToughZone lenses resist scratching, and ESSOPTICS provide distortion-free clarity and 100% UVA/UVB protection Built from extra-thick, 2.4mmpolycarbonate Crossbow replacement lenses are available inClear, Smoke Gray, Hi-Def Yellow, Hi-Def Copper, Polarized Smoke Gray, and Photochromic Light-Adapting All Crossbow replacement lenses include a black nosepiece and protective flannel sleeve