Tifosi Swank SL Sunglasses Sunglasses Gloss Black : "Where Sport Meets Life" is where the Tifosi Swank SL sunglasses come in to offer premium performance features and a modern look. These trendy frames feature shatterproof and scratch-resistant polycarbonate lenses as well as an even lighter overall weight. A special no-slip fit helps provide a stress-free, comfortable experience whether out for a run or just wearing for fun. Tifosi's proprietary glare guard lens coating reduces eye strain. 100% protection from harmful UVA and UVB rays. Lenses are constructed from scratch-resistant, shatterproof polycarbonate. Hydrophilic rubber ear and nose pieces increase their grip the more you sweat. Frames are made from lightweight Grilamid nylon TR-90 that has integrated hinges and a high resistance to chemical and UV damage.