These Arena COBRA ULTRA SWIPE MIRROR dark mirror goggles have the most advanced Swipe Anti-Fog technology which is a unique protection against fogging. It lasts up to 10 times longer. If the goggles mist up, simply wipe the inner lens gently with your fingertip. They are also equipped with a dual silicone strap with an adjustable RFA clip and have 3 interchangeable nose bridges.