Ideal as an inner or outer layer this warm Synchilla® Snap-T® is made from post-consumer recycled polyester. In fact here's a little trivia: Every Patagonia PCR sourced garment keeps 25 2-liter soda bottles out of landfills as well as displacing future oil production. Because recycled manufacturing consumes energy Patagonia takes this environmentally sound idea a step further by building the Synchilla® Snap-T® to last so when you move on to something else you can pass this one along to family friends or those in need. Chest pocket secures with a snap flap. Hem and cuffs finished with a stretchy nylon/Spandex binding to help seal in warmth.