Warm, windproof, water-resistant—the Patagonia Nano Puff Jacket uses incredibly lightweight and highly compressible 60-g PrimaLoft Gold Insulation Eco 100% postconsumer recycled polyester with P.U.R.E. technology, wrapped in a 100% recycled polyester shell and lining.This jacket finds a home with any alpine climber or backcountry aficionado—trapping heat with remarkable efficiency, even when wet. The jacket has a sculpted fit, with narrow, horizontal quilting on the shaped side panels, and the soft, wicking interior storm flap and zipper garage add chin comfort. An internal zipped chest pocket doubles as a self-stuffsack with a carabiner clip-in loop. Details include a pair of zipped handwarmer pockets, elasticized cuffs and a dual-adjust drawcord hem to seal out wind and seal in warmth.