From trails to crags to mountains, our new R1® Crew blends minimalism with performance. Its Polartec® Power Grid® fabric—made exclusively for Patagonia—features a high/low interior grid recycled polyester/spandex blend that stretches, breathes, moves moisture and insulates. The technical fit accommodates light underlayers or works as a stand-alone top, and it squashes down to practically nothing in your pack. The low-profile crewneck creates minimal bulk when layering, simple cuffs with ultrasoft binding stay comfortable against the wrists, raglan sleeves provide mobility and comfort under pack straps, and the hem slit and drop tail stay tucked into harness. With Polygiene® permanent odor control.