Patagonia Men's Nano Puff Jacket Brand new and authentic. Ships immediately. Born for climbers seeking a lightweight, packable synthetic insulation layer that handles changing weather and maintains warmth even when wet, and lasts for seasons, the Nano Puff Jacket has since gained an undisputed reputation as a popular mid-layer for almost anything outdoors thanks to its unchanging functionality. The current version, with a refined fit for even greater mobility, highlights why the Nano Puff is called the "magic jacket." Made with 60-gram PrimaLoft Gold Insulation Eco 100% recycled polyester, using P.U.R.E. (Produced Using Reduced Emissions) technology, a 100% recycled polyester shell and lining, and manufactured in a Fair Trade Certified factory.