The Mens Marmot Rocklin Half Zip is a ultra warm lightweight fleece sweater with big mountain performance. The Polyester fleece fabric of the Rocklin Half-Zip gives it distinction from the other sweaters you'd find in your closet. This Rocklin Half Zip fleece offers the perfect compromise for a mid-layer, with impressive insulating performance that weighs in at far under a pound, and compresses down to practically nothing. Sure to be a winter-long favorite, the Rocklin Half Zip also performs well as a mid-layer under a shell and a knock-about sweater for sitting around camp or hanging out around town. When you can't get around the bonfire, lighten your load and up your warmth with the Men's Marmot Rocklin Half Zip.