The Tifosi Mast SL Sunglasses will keep you on your game performing comfortably with non-slip gripping points and ventilated lenses. Hydrophilic and adjustable nose pieces and temples will provide a perfect fit and because they're water resistant they'll stay where you want them. These glasses are built for durability featuring virtually indestructible Grilamid TR-90 nylon frames and polycarbonate lenses. Tifosi is the Italian word referring to a super-fan or an enthusiast, which is who they are and who they make their eyewear for. Their mission is to provide technically advanced eyewear to enthusiasts of all sports and outdoor activities.