Mountain life is a four-season sport, one that has us getting after it through all sorts of conditions and environments—and we designed this lightweight midlayer to be the one you trust for all of them. Designed with Polartec® Power Grid™ fleece, the interior’s raised grid design provides more warmth with less bulk, trapping heat when it’s needed and letting it out when it’s not. Stretch integrated into the fabric moves through your full range of motion and fast moisture wicking keeps you dry and comfortable. Flatlock seams ensure smooth layering while thumbholes keep sleeves in place, and a concealed zipper pocket on the lower hem stashes small essentials.