1、High quality rubber tube with good stretching force and strong cushioning performance. 2、Well padded waist strap is comfortable to wear. 3、Elastic training rope is up to 13.1 ft,suitable for both adults and children. 4、Reinforced stitching and strong buckle make it stand up to a lot of wear and tear. 5、Thicken and dense mesh bag for your convenient carry. 6、Great for people who want a nonstop swim, strength training as well as daily exercise. Features: High quality rubber tube with good stretching force and strong cushioning performance. Well padded waist strap is comfortable to wear. Elastic training rope is up to 13.1 ft,suitable for both adults and children. Reinforced stitching and strong buckle make it stand up to a lot of wear and tear. Thicken and dense mesh bag for your convenient carry. Great for people who want a nonstop swim, strength training as well as daily exercise. Specifications: Material: Elastic rubber. Size: Yellow - S / Yellow - M / Blue - L / Blue - XL ( optional ). Yellow - S Pipe Length: 3 m / 9.8 ft Inner Diameter: 6 mm / 0.23 in Outer Diameter: 9 mm / 0.35 in Weight: 250 g / 8.8 oz Yellow - M Pipe Length: 4 m / 13.1 ft Inner Diameter: 6 mm / 0.23 in Outer Diameter: 9 mm / 0.35 in Weight: 270 g / 9.5 oz Blue - L Pipe Length: 3 m / 9.8 ft Inner Diameter: 6 mm / 0.23 in Outer Diameter: 10 mm / 0.39 in Weight: 300 g / 10.6 oz Blue - XL Pipe Length: 4 m / 13.1 ft Inner Diameter: 6 mm / 0.23 in Outer Diameter: 10 mm / 0.39 in Weight: 350 g / 12.3 oz Belt Length: 1.2 m / 3.9 ft Adjustable Circumference: 55 - 115 cm / 21.7 - 45.3 in Packing Size: 30 * 24 * 4 cm / 11.8 * 9.4 * 1.6 in Package List: 1 * Rubber Tube 1 * Waist Belt 1 * Tether 1 * Mesh Bag 1 * Rubber Tube 1 * Waist Belt 1 * Tether 1 * Mesh Bag