You focus on your planned split times, lace up your running shoes, pull on your favorite running top, and get ready to run faster – and maybe a little further too. This mid-layer, made sustainably from recycled fibers, is specifically designed for training in cold weather, providing active warmth and unrestricted freedom of movement. A half-length zipper allows you to individually regulate your body climate by effectively venting or insulating as needed. The perfect mid-layer for fast winter runs or intense ascents.