Patagonia Nano Puff Pullover - The Nano Puff Pullover by Patagonia is wind and water resistant. Versatile 60-gram PrimaLoft One polyester insulation provides excellent warmth and compressibility in this Patagonia Jacket. The Nano Puff Pullover can be worn as insulation or outerwear in cold. I think more things should have self-explanatory names like the pullover. For example: pants – upleggers, hat – headtopper, thongs – upbutters…that sounded better in my head. FEATURES of the Patagonia Men's Nano Puff Pullover.