product details: It is blended with nylon and latex yarn and has the characteristics of both. It has properties such as toughness, good wear resistance, high tensile strength and fast . Elastic and elastic , the tensile elasticity is not deformed, the elastic is suitable, it is not easy to , and it fits comfortably. The non- silicone is and -friendly, making it easy to off even when running. The fits, the integrated knitting process, 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 Size: M: suitable for leg circumference: 43-48 cm/16.93-18.90 inches : 1 piece Color: green + black Material: Nylon Length: 27 cm Package Included: 1*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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.