Constructed with a new fabric , the Performance Boundary II Tights provide even more warmth and support, so you can enjoy your favorite cool weather activities, like running, skiing, hiking and more. They can even be paired with your favorite cycling shorts for riding comfort. New fabric blend is extremely warm, wicking and offers gentle compression to stabilize muscles. Soft, brushed interior feels great against the skin and retains heat while allowing the body to breathe. Drawcord elastic waist allows for a custom fit, reflective details increase visibility and ankle zips make it easy to slip in and out of these tights.