A beautiful line, your climbing partner, a rope and a rack: The finest mountain days merge elegance and efficiency. Our R1 Pullover maintains a similar focus, with a high/low interior grid polyester fabric (Polartec Power Grid) that stretches, breathes, moves moisture and insulates now redesigned exclusively for Patagonia to be even lighter and more breathable. Its technical fit accommodates light underlayers or works as a stand-alone top, and it squashes down to practically nothing in your pack. Simple cuffs stay comfortable against the wrists, minimalist zippers reduce bulk, and. a soft, kissing-welt zipper garage at the chin offers next-to-skin comfort. With a smooth, microfiber face for easy layering, offset shoulder seams for pack-wearing comfort, a zippered chest pocket and Polygiene permanent odor control.