The Patagonia R1 Air Zip-Neck Fleece Jacket - Men's is a technical fleece layer for pushing the limits up in the mountains. Pull the comfort of lightweight and breathable, 100% recycled polyester jacquard fleece for warmth and unrestricted movement. Adjust the half-zip as physical activity increases and decreases for internal comfort. Tuck small items, such as lip balm, into the zippered chest pocket for quick access during the adventure.