The tifosi slip sunglasses are riding performance glasses that are packed full of features to ensure you get the best functionality with perfect vision when you are out on your bike the cycling sunglasses are made with grilamid tr 90 material that has a high alternative bending strength and low density so that they are strong and durable for more extreme riding and are lightweight on your face too the cycling sunglasses also have high resistance to chemical and uv damage and the polycarbonate