The Patagonia Nano-Air Light Jacket moves to a roomier, action-friendly fit this season, with revised shoulder and elbow articulation for enhanced reaching and layering. The face fabric adds durability, the liner breathes more freely, and heat wicks straight into the FullRange insulation to dissipate evenly instead of building up in one spot. What Our Gearhead(R) Experts Are Saying:"The insulation stretches and breathes enough that I never choose between overheating on a bootpack and shivering at the top, so I move from breaking trail to standing around without stopping to add or shed a layer."