The Patagonia Men's Nano Air Jacket is a stretch jacket for fast, cold weather summits. The Nano Air Jacket is warm, yet breathable, air permeable to 40CFM (0CFM would be 100% windproof). This allows you to throw the jacket on in the early morning for warmth, and as you work up a sweat trudging and climbing up the mountain, you won't overheat. The 20D nylon ripstop shell and the 50D nylon plain weave lining both include mechanical stretch, allowing your every move to be followed with ease and leaving your range of motion unrestricted. Inside the two fabrics is 60 grams of FullRange insulation to warm your body comfortably for the full length of the day's adventure. The Nano Puff brick quilting is found on the side panels which facilitates the overall shape and durability. The slim fit wraps closely without bulk for comfort over a base layer and under a shell depending on the conditions you come across. Finished with two hand pockets and a left chest pocket, your small items can be zippered safely inside instead of being trailed throughout the backcountry.
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