Tough as nails and big on style, the Tifosi Duro Fototec Sunglasses come with Fototect lenses with variable tint technology that adjusts rapidly to changing light conditions for superior clarity and protection. The hydrophilic and adjustable nose pieces and temples will provide a perfect fit for any activity while the vented lenses keep air flowing and fogging to a minimum. These glasses are built for durability featuring virtually indestructible Girlamid TR-90 nylon frames and polycarbonate lenses.