When the weather outside requires that extra something to keep you warm, the Patagonia Nano Puff will be lightweight, efficient, and effective. Built to be easily packable and pack a mean punch, the insulation made with 60-g PrimaLoft One polyester combines with the 100% recycled polyester exterior to make sure that there is the proper combination of protection and comfort. The Patagonia Nano Puff Vest also includes a Deluge DWR finish to keep out water. The full zip vest also has neck protection, and it features two zip up hand warmer pockets and a drawcord hem to allow for snug fitting if you so choose. At a mere 8.6 ounces, the Nano Puff Vest was made to be stashed as a “just in case” item wherever you go and can fit easily into tight spaces. Whether or not you choose to use it as a primary article of clothing or weave it into your supporting cast, the Patagonia Nano Puff Vest will do the job just as well as you need it to.