Patagonia 84246BLK Women s Nano Puff Vest BlackChilly mornings in base camp simulclimbing by headlamp and cragging in the South Platte as snow flurries fall all give the Nano Puff Vest its raison d tre. Worn as an outer- or midlayer the vest uses PrimaLoft ONE 60-g insulation for superb compressibility featherlight weight and surprising warmth. All of this is wrapped in a windproof and moisture-shedding 100 recycled polyester ripstop shell with a DWR durable water repellent finish. The vest has a sculpted fit with narrow horizontal quilt lines on the side panels and a soft wicking interior storm flap and zipper garage for chin comfort. Other fine points include a drawcord hem two zippered handwarmer pockets and an internal chest pocket which doubles as a stuff-sack.