At the limit, details are everything. And, if your optics are of poor quality, distortion of the trail is going to cause sloppy lines -- or worse, a snagged pedal. Fox Racing has been developing both motorsports and cycling goggles long enough that the Main Goggles offers excellent visibility, protection, and comfort at an incredible value. Peripheral vision is something that has suffered due to full-face helmets, and goggles as well. The Main Goggles" polyurethane frame is designed to allow as much side view as possible, and this holds true to the vertical ends of the vision spectrum as well. In between the frame and your skin is a soft and wicking triple-layer foam to maximize comfort and sweat control. Most important though, is the 100 percent optically pure Lexan lens complete with an anti-fog treatment and 100% UV protection. This ensures you see the forest for the trees from the top to the bottom of your run, while your eyes are well protected. Fox Racing has ten lenses available for the Main Goggles so you can upgrade as conditions and lighting requirements differ. Keeping the Main Goggle in place is a wide woven strap with an inner silicon lining to eliminate slippage on helmet. The Fox Racing Main Goggles comes in one size and a variety of colors to match your kit.