ESS Crossbow Eyeshield Lens Replacement Polarized Gray. These sunglasses produced by the experts at ESS are interchangeable allowing shooters to easily adapt the lenses to changing light conditions. The ESS Crossbow High-Vis Lenses let shooters keep their penetrating sights on target rather than fumbling with a cloudy pair of lenses and the magenta lenses provide excellent contrast. Keep your ESS Crossbow Replacement Lenses flipped open on a sunny day to allow your eyes to adjust to any bright conditions. Specifications for ESS Cross Bow Series Lenses: Compatible with: Crossbow Tri-Tech Fit and Crossbow Suppressor frames Thickness: 2.4mm Material: High-impact Polycarbonate Features of ESS Crossbow Series Replacement Lenses: ClearZone FlowCoat Lens Coatings Extra-Wide Field of View Interchangeable Lenses ANSI Z87.1 Compliant U.S. Mil Spec Package Contents: ESS Crossbow Replacement Lens