Cross-Series components: expand kit with Suppressor ear-muff optimized frames or use with Crosshair lenses; Advanced ClearZone FlowCoat lens treatments eliminate fog inside & prevent scratches outside; Tri-Tech Fit works for virtually all adults, provides no-slip security and maximum comfort with no pressure points; DedBolt Lens Lock keeps lenses secure under impact and enables simple and fast lens exchange; Broad Rx Compatibility. Use Rx inserts with other select eyeshields, goggles, and between specific ESS & Oakley products; ESSOPTICS deliver distortion-free optical precision throughout the entire field of view and greatly exceed ANSI standards; 2.4mm high-impact 100% UVA/UVB polycarbonate lenses