Aerodynamic lines and engineered ventilation specialize the Crit for endurance sports. Adjustable arm and nose pieces specialize the Crit for you. - All Tifosi lenses provide 100% protection from harmful UVA and UVB rays and are constructed from scratch-resistant, shatterproof polycarbonate - Grilamid TR-90 frame is made of an incredibly light and durable nylon material that resists chemical and UV damage - Adjustable, hydrophilic rubber nose and ear pieces allow for a custom fit, limiting slippage and increasing comfort - Optically decentered lenses eliminate distortion and prevent unwanted magnification - Vented lenses increase airflow to prevent fogging and help keep you cool - Tifosi's proprietary glare guard lens coating reduces eye strain