arena Cobra Ultra Mirror Swim Goggles The most advanced Arena racing goggles available; low profile mirror lenses, high-tech Moulding, and a blade shape minimize drag and improve glide Curved lens shape dramatically increases peripheral and frontal vision for an expanded field of view High-performance hard Polycarbonate lenses with an anti-fog coating for crystal-clear underwater visibility Equipped with a dual silicone strap and Arena rfa back Clip for a Super secure fit Includes 5 interchangeable nose bridges for a customized fit