Bertoni Italy Sport Sunglasses for MTB Cycling Watersports Ski Extreme Sports - Anticrash Windproof Ventilated Lenses mod. FT1000 Wraparound Sport Glasses Frame: made by unbreakable and unsinkable TPX - Weight: 21 gr. , floating ability - Lens width: 60mm ( curved sport wraparound windproof lens ) - Lens height 40mm - Wraparound design: protects the eyes from wind and bad weather, provide enhanced peripheral vision Impact resistant polycarbonate lens - 100% U.V. PROTECTION Filter cat. 3 Frame in TPX-lightest polymer , frame density 0.83g. flexible and lightweight - floating ability - Grip at the tip of the arm and nosepad: keeps the sunglasses from slipping - - thanks to their excellent grip at arms, at the nose pads and with the elastic strap, this sunglasses will stay in place Antimisting aerators: special cuts on the surface of the lens that allow ventilation and the spillover of water Adjustable and removable elastic strap to have a very skin tight fitting for extreme sports