Synthetic puffy with superior warmth to weightThe Micro Puff Jacket - Men's is the best warmth for weight jacket Patagonia has ever built. It delivers ultralightweight, water-resistant, down-like warmth with PlumaFill synthetic insulationa revolutionary featherlight down alternative. This unprecedented combination of warmth, minimal weight, and compressibilityeven when wetoffers the versatility of synthetic without compromising the benefits and feel of down. A nylon ripstop Pertex Quantum shell, with a DWR (durable water repellent) finish, blocks wind and snow. The garments design maximizes performance and minimizes useless fluff.