product description 1.[DURABLE MATERIAL] The strap is made of polyester cotton. Moderate hardness, excellent breathability, meet your daily use. 2. Elastic bands help you stretch without assistance. Help you stretch, extend exercise time, and make exercise achieve better results. 3.Multi-ring buckleAdapt to people of different heights. Adapt to different stretching angles. Adapt to different tensile strengths. 4.[Safety measures] With the help of elastic bands, you can reduce the risk of injury. Elastic bands can help you warm up. The safety factor during exercise is also greatly improved. 5. The elastic band can play the role of recovery training after a leg injury. Control strength and angle with your arms and keep your legs comfortable. achieve better recovery.