1Three-dimensional cutting, comfortable and high elasticity, directional compression and fixed protection. 2Absorb the impact force generated during the dispersion impact, reduce muscle and bone damage. 3Thicken anti-collision blocks at the elbows of the knees generate a certain amount of friction with the skin and are fastened to the legs to prevent falling. 4Ultrathin, breathable kneepad is good for sport, basketball wearing. 54 different sizes for you to choose, meet your different needs.