The DKDDSSS 4M Swim Training Belts are perfect for anyone looking to improve their swimming technique, especially swimmers of all ages, especially children. These swim training belts, also known as swim bungee cords, provide valuable resistance while swimming, helping swimmers to strengthen their body and build endurance without the need for water or even putting on wet clothes. The adjustable belt makes it easy to find the right fit, and the strap ensures a secure and comfortable fit during training sessions. Made from comfortable, durable, and non-slip material, the belt is easy to use and won't damage the swimsuit or pool surface. Its 4 meters length offers flexibility and versatility, allowing swimmers to perform a variety of exercises and improve their swimming style. The DKDDSSS Swim Training Belts are not only a handy accessory for swimmers but also a great addition to any fitness or swimming training routine.