The lightweight O Matterframe is designed to wear with hats and helmets, and the frame features a front vent to ensure enhanced airflow. Unobtainium® nosepads and molded-in earsocks provide no-slip grip when you break a sweat. Experience the pinnacle of sport performance eyewear with Sphaeraput them on and then forget them forever.Key Features:Designed for multi-sport usage: modern, sleek design with an extended field of view and optimized retention and comfortLightweight and durable: o matterframe material provides all-day comfortNo-slip grip: unobtainium® nosepads and earsocks provide no-slip grip when wet to help increase retention and help grip with hats and helmets