Ever wish you could swim laps in your own pool without actually going anywhere? This swim training belt makes it totally possible! The 4-meter long bungee cord gives you enough resistance to get a serious workout while staying in place. It's perfect for smaller pools where turning around constantly ruins your rhythm, or for anyone who wants to focus on swimming technique without the distraction of lane lines and other swimmers. The belt itself is made from comfortable TPE material that sits securely around your waist without digging in. The inner diameter is about 6mm with 9mm outer diameter - substantial enough to handle the resistance without stretching out over time. What's really cool is how it provides buoyancy for your lower body, helping maintain proper swimming position while you focus on your stroke. You can use it for all swimming styles - freestyle, breaststroke, butterfly, you name it. Installation is simple - just attach one end to a pool ladder, dock cleat, or any other secure point, and the other end clips to your waist belt. The resistance level is challenging but not overwhelming, making it great for swimmers of all levels from beginners working on technique to competitive athletes doing interval training. The 4-meter length gives you enough 'swim space' to complete full strokes comfortably. It's also fantastic for rehabilitation and low-impact cardio since swimming is so easy on the joints. Seriously, if you've got access to a pool and want to mix up your workout routine, this training tether is one of the best investments you can make for improving your swimming fitness and technique.