The Women's Patagonia R1 Fleece Jacket is made from durable, stretchy, and breathable Polartec Power Grid fabric hybridized with Capilene Thermal Weight baselayer fabric to reduce bulk and enhance lightweight performance, featuring HeiQ Pure odor control to help keep things fresh. The hybrid design provides added warmth around the core while improving breathability under the arms and venting excess heat. The hybridized fabrics offer excellent stretch and mobility, especially for overhead movement. Offset shoulder seams ensure comfort under a pack and make layering easier. A zippered chest pocket and two zippered handwarmer pockets lie flat under a harness or pack waistbelt and include air-permeable mesh pocket bags to maintain breathability. This slim-fit jacket includes a center-front zipper with a low-profile zipper garage at the chin for next-to-skin comfort, along with low-profile cuffs and hem for a streamlined fit.