The Bolle X9 OTG snow goggle is an over-the-glasses goggle that offers a medium to large fit. This helmet-compatible OTG snow goggle makes it easy to wear your eye glasses while you ski or snowboard. The Bolle P80 Carbo Glass Double Lens and Equalize Venting system help reduce fogging so you enjoy clear vision. Waterproof breathable venting equalizes air pressure between the snow goggle lens and helps eliminate moisture. The Bolle X9 Over-the-glasses snow goggles give you exceptional vision in a unique OTG snow goggle design.