There's a reason most mountaineers don't succumb to hypothermic demise anymore. When you've got gear this light and compressible, there's no reason to leave it behind. The Micro Puff's continuous hollow-filament insulation and lightweight ripstop polyester shell provide a warm (even when wet), windproof, water-shedding combination. With a deep, Deluge DWR main zipper and a hidden, zippered chest pocket. Includes a water-resistant stuff sack. Imported .