Material : Cloth , PC , spring knee booster : knee joint support knee joint support pads : power knee stabilizer pads power knee pads : acl knee brace wrap knee brace : knee protector men knee splint : knee brace support Package included:1 Pair * Knee Booster Pads Specifications: Product Name:Knee Booster Size:29.5*28*27cm / 11.61*11.02*10.62inch Strength: The Elasticity Is about 20KG Each / Help About 20KG Each Applicable scenarios: running sports, fitness equipment, hiking, climbing, camping About the product: 1. The knee stabilizer pads designed with 3 powerful rebound springs. it can reduce up to 20 kg from your own weight! It can support your legs and provides your knees with the extra support, also absorb some of the weight when bending. 2. The main function take pressure off your knee and make your steps lighter. They can effectively prevent excessive knee flexion, relieve knee pain caused by arthritis and meniscus tears, etc. It will be a little unacceptable to use at the beginning and need to take some time to adapt.  3. The knee brace with spring will not limit your activities. Instead, it will allow you to do any exercise easily, suitable for running, fitness, hiking, mountain climbing, cycling, skiing, soccer and other sports. Suitable for exercise enthusiast adult men women, especially the elderly. 4. Diving Cloth + PC + spring material, cushion EVA and breathable sweat-absorbent SBR cotton. Hook & Loop easy dress design that whether inside or outside of your clothing. Fit all size of knee. 5. You can got 1 pair of knee support! Breathable and comfortable material, adjustable size. PLEASE NOTE: The knee boosters are only auxiliary.