When you want to let it rip, this technical long sleeve will push the pace with sweat-wicking superpowers. Designed specifically for fast and light running with ultra-breathable mesh under the arms and on the back, the Norvan regulates your temp without extra bulk or distraction. Built to wear under a run vest, so there’s no pack chafe to slow you down. What's been updated: Updated fabric is highly breathable and now made with recycled content. This version is also more lightweight than the previous model (85g vs. 111g).