The Micro Puff Jacket has the best warmth-to-weight ratio of any synthetic jacket Patagonia have ever made. The Micro Puff® maximises performance and minimises pointless fluff, using ultralightweight, water-resistant PlumaFill synthetic insulation to deliver all the warmth and packability of down but with the warm-when-wet performance of synthetic insulation. Micro Puff Jacket - Men's