Born of shoulder-season belay duty and springtime ski tours, the Nano Puff Jacket finds a home with any alpine climber or back country skier. Its 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 sculpted fit, with narrow horizontal quilting on the shaped side panels, and the soft, wicking interior storm flap and zipper garage add chin comfort. Its internal zippered chest pocket doubles as a self-stuffsack with a carabiner clip-in loop. It also has two zippered hand-warmer pockets, elasticized cuffs and a dual-adjust drawcord hem to seal out wind and seal in warmth.