The Tifosi Mast Sunglasses will keep you performing comfortably with non-slip gripping points and ventilated interchangeable 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 Girlamid TR-90 nylon frames and polycarbonate lenses. Not only are the lenses tough, they're also interchangeable, choose between smoke bright blue, ac red or clear and change them on the go. 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.