Features1Smart molecules, shockabsorbing soft protective gear, the protective sheet is made of hightoughness silicone material, with strong buffering capacity, effectively avoiding the injuries caused by children falling. 2Under the condition of no force, it remains relaxed, soft and elastic. Under the force, the molecules lock each other instantly and harden to offset the external force, disperse the force, and recover as before. 3High elastic polyurethane fiber, comfortable silicone elastic stretch, tightly wrapped, sweatabsorbing and breathable, soft and comfortable. 4360degree elastic fit, ergonomic design, threedimensional tailoring, fit the body curve. 52 different types for you to choose, meet your different needs.SpecificationItem type: Children Protective Gear Material: silicone + polyurethane fiberColor: blackFeatures: comfortable and breathable, non-slip and anti-fallApplication: balancing scooter, roller skating, skateboarding, running, etc.Suitable for the crowd: 3-7 years old children universalSize:TypeElbowcircumference(cm/in)Knee circumference(cm/in)Recommended weight(kg)Size13-19/5.1-7.518-24/7.1-9.412.5-22.5Package List1 Pair xKneepad