Get that same cool cylindrical look for you "extra medium" size face with the Oakley Fall Line XM Goggles and enjoy the superior optical quality and comfort that Oakley's famous for. See better, ride better, and look cooler at the same time. O Matter Chassis Flexible O Matter frame conforms to your face and remains flexible even in extreme cold. Anti Fog Dual vented Plutonite lenses with F3 coating, which allows the inner ballistic lens to absorb a minimum of 2 ml of moisture. Dual Vented Lenses Dual vents and F3 anti-fog coating keep your vision crystal clear. Triple Layer Polar Fleece Foam Moisture wicking triple-layer polar fleece foam assures all-day comfort. Silicone-Backed Strap Non-slip strap keeps your goggles in place even on slippery helmet surfaces.