Bolle Tempest Sunglasses, Shiny Black Frame, PC True Neutral Smoke Lens B-clear technology features ultra-lightweight trivex lens material, dual-sided hydrophobic/oleophobic coatings Carboglas Coating gives an armor shell from scratches and abrasions Optics Control System is an interchangeable lens System that allows you to swap out the lenses for different lighting conditions B88 frames are made of the finest grade Nylon for incredibly lightweight, durable, flexible frames Adjustable nose pads to tailor a custom fit, hypoallergenic and comfortable Anti-Fog and Non-Polarized Competitor Sunglass Polycarbonate Lenses made from premium grade resin, 20 x more impact resistant than glass, 3 x lighter Oleo phobic/hydrophobic lens treatment repels dirt, grease and water spots High-strength Thermo grip rubber temple and nose pads Offers 100-percent UVA and UVB protection