This is a knee, which is made of materials, durable for use. Elastic pressure design to tighten leg muscles, which is . Professional sports protector that the knees can effectively buffers external pressure and shocks during strenuous exercise. Features -Color: Blue -Material: Spandex, nylon, latex silk -Size S: About 28.00X14.00X12.00cm/11.00X5.50X4.72inch (recommend calf circumference: 30-35cm; recommend weight: 40-50kg) -Size : About 28.00X15.00X13.00cm/11.00X5.89X5.11inch (recommend calf circumference: 35-42cm; recommend weight: 50-65kg) -Size L: About 28.00X16.00X14.00cm/11.00X6.29X5.50inch (recommend calf circumference: 42-52cm; recommend weight: 65-80kg) -Size XL: About 28.00X17.00X15.00cm/11.00X6.68X5.89inch (recommend calf circumference: 52-57cm; recommend weight: 80-95kg) - There is anti-slip strip on knee pad, humanized design, so that people are not easy to fall off even in running. - Elastic fabric, uniform force on all sides, comfortable and not tight, so that you have no sense of in wearing. - The fabric is comfortable and breathable, suitable for air conditioning room and any place that feels cool enough to use, not stuffy. - Fine workmanship and fabric make this pair of knee braces durable and strong. - Suitable for riding bicycles, running, playing basketball and other sports. Package list: 1 x Knee Pad