Can be upgraded premium Crossbow lenses Compliant with U.S. MIL SPEC MIL-PRF-32432, ANSI Z87.1-2015, CE EN 166 and U.S. Federal OSHA 100% UVA/UVB protection At ESS, superior function comes standard. The ESS Crosshair exceeds ANSI Z87.1 optical standards and U.S. Military impact requirements while providing all-day comfort and a universal fit. This entry-level eyeshield goes well beyond the basic necessities of eye protection: with a baseline of advanced performance and superb adaptability, the Crosshair benefits from complete compatibility with the ESS Cross-Series eyeshield platform. As part of the ESS Cross-Series, the Crosshair can be upgraded at any time with premium anti-fog Crossbow lenses, including the high-impact polarized gray option. It can also be adapted for use under hearing pro and comms gear with ESS&';s ultra-thin suppressor frames. With the Crosshair and Cross-Series, ESS has bridged the gap between price and premium performance. Now, more than ever, your eye pro kit can match your mission requirements, and your budget.