Arena Cobra Core Blue Goggles are reliable, comfortable and stylish and loved by swimmers in training and racing. When swimming at your top speed, you need goggles that ensure wide vision and optimal comfort. Engineered for racing, Cobra Core has high-performance hard lenses for crystalline visibility and a special shape for improved lateral vision. They are anti-fog, leak-proof and provide UV protection. Easily adjust the fit with the dual silicone strap and interchangeable nose bridge. We recommend these goggles for triathlon racing also.