The Know has a frame made from lightweight, flexible and durable grilamid and is suitable for almost any athletic endeavor.The rubber nosepiece and temples stay grippy even when wet, so the glasses will stick to your nose when you move, regardless of rain or transpiration. The nylon lenses are treated with Ripel, for clear vision and easy cleaning. Key Features: Complete UV protection (UV400),. KNOW frame dimensions: Height: 51,5 mm,Width: 135 mm,Temple length (from hinge): 130 mm.