This Patagonia vest is NWOT however has a flaw, in that both cord locks are broken. Aside from that, perfect new condition. Size large measures 24.5” across under arm holes and 27” down from shoulder. The Micro Puff uses PlumaFill synthetic insulation, which mimics the warmth and compressibility of down but retains warmth even when wet. It is made with an ultralight, windproof Pertex Quantum shell, constructed from recycled nylon ripstop (NetPlus), made from recycled fishing nets. The insulation is held in place with an innovative quilting construction that uses minimal stitching to maximize loft and reduce weight. The vest can be packed into one of its internal or external pockets, making it highly compressible and easy to store. Includes two zippered handwarmer pockets and one large internal drop-in pocket for extra storage. Comparison to Nano Puff: Warmth: The Micro Puff is suggested to be warmer than the Nano Puff due to its greater insulation loft. Stitching: The Micro Puff uses less stitching than the Nano Puff's "brick" pattern, which helps reduce weight and prevent heat loss. Weight: The Micro Puff is generally lighter than the Nano Puff.