The Patagonia men’s Nano Puff Jacket delivers lightweight insulation for alpine climbers and outdoor enthusiasts in search of a hydrophobic mid layer or stylish standalone warmth. It’s padded with low-bulk, highly compressible PrimaLoft Gold Insulation Eco, which is made of 55% postconsumer recycled content and retains heat with efficiency, even when its wet. The jacket’s recycled polyester ripstop shell blocks the wind, sheds moisture and layers effortlessly. The Nano Puff has narrow, horizontal quilting on the shaped side panels, and comes in a sculpted fit. Zippered handwarmer pockets provide storage options. An internal zip chest pocket doubles as a self-stuffsack while coming equipped with built-in carabiner loop. The front zipper is backed by a wind-stopping storm flap, the sleeve cuffs are elasticized for a comfortable fit, and the drop-back lower hem is dual-adjustable to seal out cold winds.