The Patagonia Men's Micro Puff Jacket is an ultralight and ultra packable Insulation layer designed for cold weather activities. Lofty PlumaFill Insulation offers comfort, compressibility, and warmth akin to goose down, with the enhanced wet weather Performance of a synthetic. Offset brick baffles minimize stitching to maximize loft, save weight, and reduce cold spots. The Pertex Quantum; exterior offers windproof Performance and features DWR finish to fend off light precipitation. Stuff the jacket into its own pocket for storage in your pack or to hang it from your Climbing harness.