Patagonia Nano Puff Vest in black features a lightweight, windproof, and water-resistant design with 60-g PrimaLoft Gold Insulation Eco. This versatile layering piece includes a brick quilting pattern with horizontal side panels, a full-length zipper with an internal storm flap, and two zippered handwarmer pockets. A unique Shake Shack burger logo is embroidered on the right chest, making this a rare corporate collaboration piece. The hem is adjustable with a drawcord to seal in warmth, and the entire vest can be stuffed into its own internal chest pocket for easy packing.