Feature:1. Polyurethane fiber, high elasticity, high resilience, can provide support and fit, with sweat absorption and breathability.2. Four-needle, six-thread, rigorous sewing and tear resistance, multiple stitching, seamless stitching, close-packed explosion-proof.3. The special Cellular cushion design supported by the knee effectively resists the impact force, avoids the external force injury, and reduces the possibility of injury when hitting or slipping on the ground.4. Anti-skid silicone strips on the cuffs, intimate design, effectively prevent sliding up and down during sports, improve sports performance.5. 2 different types for you to choose, meet your different needs.Specification:Condition: 100% brand newItem type: Children Anti-Collision Kneecap Material: polyurethane fiber + polyesterColor: blackOptional type: YS(3-5years old), YM(6-9years old)YS length: Approx. 22cm/8.7inYM length: Approx.23cm/9.1in Package List:2 xChildren Anti-Collision Kneecap