Features: Size: S=Chest 34.6, Waist 29.9 / M=Chest 36.2, Waist 31.5 / L=Chest 37.8, Waist 33.1 / XL=Chest 39.4, Waist 34.6 / XXL=Chest 40.9, Waist 36.2 (Optional) Made of 3mm neoprene and nylon material, soft and warm. Full body design provides protection against UV rays and water irritants. Flat-lock stitching is comfortable enough for all-day wear. Extra long leash and back zipper for comfort and convenience. Smooth seals at the cuffs and leg openings seal out water. Great for diving, snorkeling, swimming, surfing.