The ESS Crossbow Photochromic ONE Ballistic Eyeshields deliver the protection and clarity you need. Photochromic lens is UV activated to adapt quickly to changing light conditions, and 2.4mm high-impact polycarbonate lenses protect against 100% of UVA and UVB rays. Plus, ClearZone FlowCoat technology prevents fogging and minimizes scratches, so you can always see with unmatched clarity. ESSOPTICS ensure distortion-free optical precision throughout the entire field of view. Tri-Tech fit resists slipping and maximizes comfort without creating pressure points. DedBolt Lens Lock secures lenses under impact and enables quick and easy lens exchange. Compatible with helmet-mounted nightvision devices. Compatible with MICH, ACH, LWH, CVC, FAST, Crye and Ops-Core helmet systems. Meets U.S. mil-spec MIL-PRF 32432, ANSI Z87.1-2010, OSHA CE EN 166 standards (except polarized eye protection, which meets ANSI Z87.1-2010 and OSHA standards). Includes Crossbow frames and zippered hard case and cleaning cloth. Cancer and Reproductive Harm- www.P65Warnings.ca.gov.