Improved for safety and comfort, the Long Belt Slider is StrechCordz' s #1 in-water resistance product. Used for resisted swim out and speed-assisted swim back exercises. Accelerate quicker, strengthen the finishes of each stroke and improve your times. Running the entire length of the tube is our Safety Cord; which adds safety and security in the event of breakage. PRODUCT FEATURES: Features a 2-in (5 cm) waist belt that fits up to 44-in (1.1 m) waist, padded for comfort and connected to 20 feet (6 m) of latex safety corded tubing. The sliding attachment moves freely around the belt for unrestricted movement. Used in either 25-yd or 25-m pools. Interchangeable.