product details: It is blended with nylon and latex yarn and has the characteristics of both. It has excellent properties such as toughness, good wear resistance, high tensile strength and fast recovery. Elastic and elastic design, the tensile elasticity is not deformed, the elastic is suitable, it is not easy to slip, and it fits comfortably. The non-slip silicone design is corrugated and user-friendly, making it easy to slip off even when running. The curve fits, the integrated knitting process, close to the joints and muscles, strengthen the fastening and protect the joints. Description: Name: High quality knee pads Features: warm, soft, breathable Function: protect the knee, prevent arthritis, relieve joint pain Size: L: suitable for leg circumference: 48-53 cm/18.90-20.87 inches Quantity: 2 piece Color: green + black Material: Nylon Length: 27 cm Package Included: 2*Sports knee pads Notes: Transition: 1cm=10mm=0.39 inch Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.