Patagonia Micro Puff Jacket - Men's:

The best warmth for weight of any jacket we’ve ever built, the Micro Puff® Jacket delivers ultralightweight, water-resistant, down-like warmth with PlumaFill synthetic insulation—a revolutionary featherlight down alternative.

Features:

• Ultralight nylon ripstop Pertex Quantum® shell is water-resistant, windproof and treated with a DWR (durable water repellent) finish
• Revolutionary PlumaFill insulation replicates the structure of down in a continuous synthetic insulation material, offering the warmth, packability and feel of down but with the warm-when-wet performance of synthetic insulation
• Innovative quilting construction complements the insulation by stabilizing and maximizing the loft of the PlumaFill strands with minimal stitching
• Center-front zipper has storm flap and zipper garage at chin for next-to-skin comfort
• Two welted zippered handwarmer pockets and two internal drop-in pockets; left pocket doubles as a stuffsack with a reinforced carabiner clip-in loop
• Elasticized cuffs and hem seal in warmth