The SLEEFS compression knee pad are made of tough non-woven antibacterial 80% polyester and 20% spandex material yet have a second-skin feel offering an excellent sun protection (UPF 50+). The SLEEFS pad provides maximum knee protection while maintaining your legs comfortable. They are manufactured with a seamless design for ergonomic fit and come with a 6-thread flat-lock technology for strength at the seams. The pads resist ripping and tearing and can be used in all weather conditions. All knee pads designs are designed in USA.