Made of EVA Sponge Material: Sweat absorbing, deodorant, moisture-proof and environment-protective. It is soft and comfortable for holding .Anti-dust Bearing: 360°low noise rotation, durable and stable, smooth swing without twine .Bold PVC with embedded wire rope: Durable and reliable in use, effectively improve your jump rope speed. Adjustable Rope Length: The rope length can be adjusted according to your need that can improve your sense of use. Maximum Comfort: Scientific design with light weight ergonomic handles can improve your comfortable sense when you are doing sports. Smooth and Fast: The ball bearing system avoids twisting, tangling or bending that make you skip more easier.