A beautiful line, your climbing partner, a rope and a rack: the greatest days merge elegance and efficiency and shouldn't be ruined by chilly weather. Patagonia's R1® Pullover maintains a similar focus, with a finely tuned high/low interior grid polyester fabric (Polartec® Power Dry® polyester) that stretches, breathes, moves moisture and insulates. It squashes down to practically nothing, has a terrific feel and remains durable and warm. Sized to accommodate light under layers, it works as a stand-alone top or as a light midlayer. With a smooth, microfiber face for easy layering and raglan sleeves for pack-wearing comfort.