After countless desperate pitches, scores of alpine summits, and miles upon miles of backcountry powder, our R1® fabric has compiled a worthy résumé. It stretches, breathes, wicks and warms with ultimate efficiency, and the full-zip iteration offers added versatility. The finely tuned high/low interior grid polyester (Polartec® Power Grid™), exclusive to Patagonia, is now even lighter and more breathable. With its technical fit and durable fabric, it squashes down to practically nothing in your pack. With redesigned simple cuffs, minimalist zippers to reduce bulk and a soft, kissing-welt zipper garage at the chin for next-to-skin comfort. Two zippered handwarmer pockets sit above harness line, with their mesh pocket bags doubling as internal drop-in pockets, and the offset shoulder seams steer clear of pack straps. Polygiene® permanent odor control ensures civilized tent time.