and high quality. Materials: knee warmers are made of soft and breathable fabrics, with elastic and lightweight features, more comfortable and convenient to wear and pull off, anti- and stay in place. Suitable occasions: this knee pad is suitable for sports such as football,,basketball, climbing and other outdoor activities, provides the perfect compression to help you feel better during exercise. Thermal design: with thermal fabric design, these knee pads can bring you warmth in different seasons. Note : products do not include mobile power , use your own mobile power. Note: We recommend using 5V / 2A to a good heating effect. Colour:black :300D cationic Oxford cloth + fleece + washed cotton Size:Height about: 57cm Package Contents: 2 x Leg sleeves Only the above package content, other products are not included. Note: Light reflection 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.