Youth MX XS O Frame Goggle. There's no age limit on breaking the laws of physics, so these youth-specific designed goggles take advantage of reduced cranial geometry to bring the protection of Oakley's MX O FRAME to smaller faces. The optically pure LEXAN® is treated for scratch resistance and mounted in the perfect arc of a circle for maximized clarity. The durable urethane frame stays flexible even in cold weather, and Oakley added an extra layer of face foam to optimize comfort and fit. Non-slip silicone keeps the wide, adjustable strap from sliding off your helmet. Flexibility even in extreme cold via urethane frame construction. Glare reduction and tuned light transmission of Iridium® lens coating (optional). Comfortable and secure fit of wide, adjustable elastic strap. Minimized reflective glare via interior surface texturing. Convenience of 2-pin attachment system for tear-offs.