The ESS Crossbow Suppressor is the first spectacle frame designed for use with ear cup hearing protection and communications devices. Featuring Z-Bend Geometry, the frame's ultra-thin temple arms help keep noise out by minimizing the effect on the padded seal of ear cups. The slim temples eliminate the hot spots and pressure points that commonly occur when normal eyewear is worn under ear cups. The Suppressor frame is compatible with all Crossbow lenses. These 2.4mm Polycarbonate lenses feature distortion-free ESSOPTICS and ClearZone FlowCoat technology to combat fogging on the inside and scratches on the outside. The frame's DedBolt. Lens Lock provides quick lens interchange and rock-solid retention under impact.