The Marmot Men’s Rocklin 1/2 Zip is a fleece pullover for cool days and layering. The 100 weight fleece is lightweight and ready for hanging out in town and days on the trail. Don’t let a cool weather day get you down, add some warmth to your upper half and if the sun starts beating, open the 1/2 zip to regulate temperature. It packs down small, so you can even just remove it to reveal your bad self in a tee instead, jamming the fleece into your backpack. Options are good.