The Patagonia Nano Puff Jacket—wear it as a sleek micro-belay parka on chilly fall rock routes or as an insulated jacket during wintertime squalls. The wind-blocking, 100% recycled polyester shell sheds moisture and glides effortlessly in your layering system. Low-bulk, hydrophobic, highly compressible PrimaLoft Gold Insulation (60-g) traps heat with remarkable efficiency, even when wet. The jacket has a shaped fit and the soft, wicking interior storm flap and zipper garage adds chin comfort when zipped up. Its internal zippered chest pocket doubles as a self-stuff sack with a carabiner clip-in loop. It also has two zippered handwarmer pockets, elasticized cuffs and a dual-adjust drawcord hem to seal out wind and seal in warmth.