Patagonia Men’s Nano Puff Jacket in Black size Medium. Warm, windproof, water-resistant—the Nano Puff® Jacket uses incredibly lightweight and highly compressible 60-g PrimaLoft® Gold Insulation Eco 100% postconsumer recycled polyester with P.U.R.E.™ (Produced Using Reduced Emissions) technology, wrapped in a 100% recycled polyester shell and lining. Center-front zipper has a wicking interior storm flap and a zipper garage at the chin for next-to-skin comfort. Two zippered handwarmer pockets have cleanly finished zipper garages; one internal zippered chest pocket doubles as a stuffsack with a reinforced carabiner clip-in loop. Drawcord-adjustable drop-tail hem seals in warmth.