Sometimes shiver-proof protection comes in small packages—like the Patagonia Women's Nano Puff Vest. This warm, water-resistant and windproof vest features lightweight 60-g Primaloft® Gold Insulation Eco—with 55% postconsumer recycled content—wrapped in a moisture-shedding 100% recycled polyester ripstop shell with a DWR (durable water repellent) finish. The vest has a shaped fit and a soft, wicking interior storm flap and zipper garage for next-to-skin chin comfort. Other fine points include a drawcord hem, a pair of zippered handwarmer pockets and an internal chest pocket (with clip-in loop) that doubles as a stuffsack. Incredibly lightweight and packable, the Nano Puff® Vest is an ideal cool-weather travel companion, whether you're keeping it simple over a shirt or layering under a shell.