The Patagonia Women&';s Nano-Air Light Jacket is a breathable, stretchy active-insulation layer built to keep you comfortable during high-output pursuits in the cold. FullRange insulation delivers warmth with exceptional breathability and four-way stretch, so you can leave it on from the approach to the summit, while a DWR-treated recycled shell sheds light rain and snow. Features: 40-g FullRange stretch insulation: Warm, highly breathable, and stretchy so you stay comfortable on the move. Breathable stretch-woven shell: Moves with you and dumps excess heat during high-output activity. DWR (durable water repellent) finish: Sheds light rain and snow to keep you dry. Full-stretch construction: Unrestricted mobility for climbing, ski touring, and fast hikes. Zippered handwarmer pockets: Secure storage and warmth on cold days. Fair Trade Certified sewn: Supports fair wages and safe working conditions.