A copper-colored Hi-Def replacement lens for ESS Crossbow shooting glasses. The Hi-Def Copper lens is designed for normal to medium (half dim) light. The lens improves contrast and depth perception, so you spot your target better from the ground. ESS – Combat proven ballistic eyewear Eye Safety Systems is an American company that manufactures combat proven eye protection for extreme conditions. ESS eyewear is used by both Finnish and American army, as well as in fire/rescue services and shooting sports markets. All ESS ballistic eyeshields meet the ANSI Z87.1-2010 and U.S. Mil Spec standards. See the test lab video by ESS explaining the U.S. military impact standards for eye protection:
