Collision Protection& Windbreak:Special design knee pads using folded PU make the knee support windbreak,effectively resist the impact force, avoid to get hurt from external pressure it suitable using cycling, running basketball..etcSpecial Anti-Slip Designed:This men's knee sleeve protect has special silicone anti-skid design dot to keep this knee brace from sliding down or rolling during physical activity.Fleece Fabric: 85% polyester, 15% spandex.The knee sleeves are using fleece fabric inside. It's very soft, lightweight,breathable keep out the cold and windReliable Safety: The knee brace are highly durable, reflective strips on both side of the leg, they improve the safety of night or low-light condition cycling,running