Patagonia Nano Puff Jacket Made of synthetic fibers, it's easy to wash and packable for easy carrying. Born for climbers seeking a lightweight, compact, and packable synthetic insulation layer that adapts to changing weather conditions and maintains warmth even when wet, and that can withstand many seasons of use, 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 ease of movement, highlights why the Nano Puff is called the "magic jacket." It uses 60-gram PrimaLoft Gold Insulation Eco made of 100% recycled polyester recovered from consumers, a shell and lining made of 100% recycled polyester, and is manufactured in a Fair Trade Certified factory, employing P.U.R.E. (Produced Using Reduced Emissions) technology.