I'm excited to write a product description for a jacket that has served me well in the past. I could go on and on and on about the Patagonia Men's Nano Puff Jacket (I'll try to limit it to just "on and on"). First let me throw some details at you. The Nano Puff is filled with PrimaLoft ONE synthetic insulation which traps heat, even when wet. The outer shell is lightweight ripstop recycled polyester with Deluge DWR finish to shed moisture. All of this adds up to a slight 11.8 oz. On a thru-hike of the PCT, I wore a Nano Puff almost every evening around camp (especially in the Sierras), used it every night as a pillow and wore it in every town while I did laundry. It stood up to all I could throw at it and remains my go-to insulating layer in the winter. This year's model is even better as it has an improved fit through the torso and waist, and an added interior storm flap behind the zipper. I can't say enough about this jacket.
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