Shop our excellent range of Arena Cobra Tri goggles for all your open water swimming needs. The Arena Cobra Tri goggles collection offers the ultimate goggle solution for triathletes and open water swimmers. Popular options from the Arena Cobra Tri goggle range include the Arena Cobra Tri Mirror goggles, which offer superb clarity in most conditions. The Arena Cobra Tri goggles are available in a variety of colourways, check them out on Swimmer.