The Women’s Expert 2.0 Insulator Joint Support Compression Tight is made of WarmStretch temperature-regulation fabric to maintain a constant comfortable surface temperature in a variety of conditions — perfect for the cold weather athlete. The patented CW-X EXO-WEB bands together the muscles and ligaments of your lower leg to stabilize the knee and reduce vibration for increased efficiency. Graduated compression facilitates circulation during and after activity, minimizing lactic acid build-up so that you can be active longer and recover faster. It can be worn on its own or as a baselayer for winter sports.