Aerodynamic lines and engineered ventilation specialize the Crit for endurance sports. Adjustable arm and nose pieces specialize the Crit for you. Made of Grilamid TR-90, a homo-polyamide nylon characterized by an extremely high alternative bending strength, low density, and high resistance to chemical and UV damage. Hydrophilic rubber ear and nose pieces for a no-slip fit. Adjustable ear and nose pieces for a customizable, comfortable fit. Vented lenses improve air circulation, prevent fogging. Fototec lenses ensure you perform at your best in any lighting condition. The lens light transmission ranges from 15.2% in bright light to 47.7% in low light. The Crit sunglasses have temple bars measuring 5" (128 mm) with lens dimensions of (H x W) 1.65" x 2.9" (42mm x 74 mm), with a bridge width of 0.47" (12mm). Glasses come with a zippered closure protective case for storage and transport and care & maintenance instructions. The smoke lenses are great for full sun conditions. The Crit sunglasses have a medium/large fit.