AN ACTIVE INSULATOR FOR COMFORTABLE WARMTH - THE PATAGONIA NANO-AIR JACKET.Designed as an active insulating layer for high-output alpine missions in cold weather, the Patagonia Nano-Air Jacket delivers toasty warmth, breathable performance, and ultimate next-to-skin comfort. The FullRange insulation regulates your temperature on cold ascents while the soft, durable, and air-permeable fabric lets your heat escape. DWR coating beads off light rain and moderate snow in the mountains and the low-profile cuffs are even designed to easily slide underneath a shell. One of the best things about this jacket is its ability to stuff down into its own chest pocket for easy packing. Plus, the slim fit and hood-less design make it ideal for layering. FEATURES100% polyester (now 87% recycled) plain-weave shell and lining fabric offers generous mechanical stretch, exceptional breathability and improved abrasion resistance; microtexture creates excellent next-to-skin comfort; features a DWR (durable water repellent) finishRevolutionary 60-g FullRange-