ESS Crossbow Suppressor 2X Eyeshields Safety Glasses Black w/ Clear & Smoke Lenses. The Crossbow Suppressor 2X Unit Issue by ESS is the first Glasses frame designed to provide more comfort around your ears when wearing hearing protection or communication devices. Unlike most shooting glasses the ESS Crossbow Suppressor 2X 0451 eliminates the hot spots and pressure points that commonly occur when normal Glasses is worn under ear cups. These ESS Shooting Glasses feature Z-Bend Geometry which offers ultra-thin temple arms to assist in noise reduction by minimizing the effect on the padded seal of ear cups. The ESS Crossbow and Crossbow Suppressor 2X frames are also compatible with all ESS Crossbow Lenses. Do you wear prescription eyeglasses? Then check out the ESS URX Prescription Insert - Universal RX Specifications for ESS Cross Bow Suppressor 2X Eyeshields Unit Issue: Frame Color: Black Lens Color: Clear Smoke Gray Lens Thickness: 2.4mm Lens Material: Polycarbonate Antifog: Yes Polarized: No Photochromic: No Ballistics: U.S. MIL SPEC MIL-PRF- 31013 ANSI Z87.1+ MCEPS U.S. Federal OSHA CE EN 166 FTKN Features of ESS Cross Bow Suppressor 2X Military Glasses: Ultra-thin Suppressor temple arms with Z-Bend Geometry Standard Crossbow Tri-Tech Fit Frame with Clear lens achieve a universal fit with max comfort and zero pressure points Optimized for use under ear cup hearing pro and comm gear DedBolt Lens Lock provides quick lens interchange and rock-solid retention under impact Advanced ClearZone FlowCoat lens treatments eliminate fog inside and prevent scratches outside High-impact Polycarbonate lenses ESSOPTICS deliver distortion-free optical precision throughout the entire field of view Lenses are interchangeable Provide 100percent UVA/UVB protection Rx Inserts available Package Contents: ESS Suppressor 2X Unit Issue 740-0451 (1) Ultra-thin Crossbow Suppressor Frame (1) Standard Crossbow Tri-Tech Frame (1) Smoke Gray lens (1) Clear lens Large zippered hard case Elastic retention strap