The approach heats a climber up, and the belay cools them right back down, and the Summit FUTUREFLEECE Overlay Hoodie, a technical fleece hoodie from The North Face Summit Series, handles both. Fleece panels in targeted zones carry the warmth for very little weight, while stretch-woven overlays cover the front body, back yoke, and tops of the sleeves, where straps and rock rub the fabric. Underarm gussets and no shoulder seams keep the sleeves from binding on every reach and clip. What Our Gearhead(R) Experts Are Saying:"I wore it on a long ridge hike and a scramble at the top without swapping layers, and I never felt overheated on the way up. The moment I stopped for lunch, it held the chill off, so it now lives in my pack for every alpine day."