The Patagonia Men's Retro Pile Long Sleeve Pullover is made from polyester double-sided shearling, the fabric provides easy-wearing warmth thanks to a soft, fuzzy exterior and a smooth, skin-friendly interior. The center-front zipper extends to the top of the stand-up collar for quick venting of excess heat, and the set-in sleeve design allows full mobility and compatibility with pack straps. Flat-seam construction throughout the pullover reduces bulk and helps minimize seam chafe. A zippered left-chest pocket holds the daily necessities. Soft spandex trim finishes the cuffs and hem. Fair Trade Certified™ for sewing, which means the people who made it earned a premium for their labor.