The Arena COBRA ULTRA MIRROR are popular swimming goggles. Perfectly hydrodynamic with low-profile lenses, hi-tech moulding and sharp edges, the goggles minimize drag and improve glide in elegant, watertight design. The curved shape of the lens dramatically improves peripheral and frontal vision for an expanded field of view. The high-performance lenses are made of hard polycarbonate with an anti-fog treatment for crystal-clear visibility. The goggles are equipped with a dual silicone strap, 5 interchangeable nose bridges and adjustable RFA clip.