Name: sponge pads to protect anti-collision knee pads. Style: sleeve type Color: Black Material: cotton, high elastic latex silk, sponge Size: one size, fits legs 38-52cm. Set of 2 protective knee pads made of durable foam and nylon blend\/ spandex. Breathable and lightweight materials keep skin cool during aerobic activities and do not restrict movement. Ultra thin design: Easy slip-on design that can be worn under or over clothing if needed. The flexible spandex fit will hug your knee and the non-slip grip will allow the protectors to stay in place. Ideal for sports, workwear or general use where extra knee protection is needed. Preventative Protection: Foam knee pads are beneficial in minimizing potential risk of collision and impact, the snug fit helps keep muscles warm through increased blood flow and slight compression during movement. : One piece