The Si Ballistic Det Cord Is The Perfect Blend Of Ballistic Protection And Oakley Fashion. Fully Compliant With The Ballistic And Optical Standards Of Mil Prf32432 And Ansi Z87.1 (2010), The Si Ballistic Det Cord Is Balanced For Aggressive Environments And Covert Capabilities. The Si Ballistic Det Cord Is Also Fully-Equipped With Its Anti-Fog Coating, Comms Compatible Ear Stems, And Rubberized Unobtanium Nosepiece. It Is One Piece Of Eyewear That Is Ready For Any Situation. Features Oakley Si Prizm Technology Uses Formulated Dye Compounding Technology Producing A Color-Tuned Lens Specifically For Shooting Developed Specifically For Shooting, Tr45 Lens Brings Enhanced Contrast To A Variety Of Targets Such As Steel And Cardboard. Ideal During Low Light Or Overcast Conditions, This Lens Is Balanced For Both Arid And Woodland Environments. Developed Specifically For Shooting, Tr22 Lens Enhances Both Targets And Terrain, And Is Best Suited For Bright Light Conditions.