Yellow Hi-Def spare lens for ESS Crossbow ballistic glasses. The Hi-Def Yellow lens is designed to be used in conditions ranging from cloudy weather to dusk. The lens improves contrast and depth perception, so you can distinguish your target more easily from the terrain. 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:
