The Patagonia Men's Nano-Air Vest is an insulated vest for getting up into the mountains. The FullRange™ synthetic insulation plays best in cool to cold conditions and high output activities. Behind a nylon ripstop exterior shell hides 60g of insulation, so any light rain or snow sheds off quickly and your core gets the boost of warmth it needs. Pile it on top your base layer and use it alone or throw a hardshell on top for a minimal midlayer. Either way your arms are free and you'll be exploring the mountain like a champ.
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