A Patagonia staple, the Nano Puff Vest combines the light, ethereal warmth of the classic Nano Puff Jacket with the flexible agility of a vest. This Primaloft vest can be used as an ultra-light mid-layer or a windproof outer-layer. Windproof Superwarm Highly compressible Primaloft Unique quilt pattern holds insulation in place promoting durability and longevity