Made of transparent thermoplastic polyurethane (TPUR) on the front and blue on the back, the case is padded and lined, Equipped with an adjustable cord and an anodized aluminum carabiner, Yellow waterproof clasp for high visibility , Ideal for trips to the beach or pool, boat trips, snorkeling, etc., Maximum circumference: 7 1/4 in (18 cm), 4 ft x 6 ft (10 cm x 15 cm) .