There's nothing worse than going on a hike in chilly weather and having to constantly put on and take off your jacket because you're too hot--that scenario is now an antiquity as a result of Patagonia's Nano-Air Jacket. Equally breathable and insulating, his jacket holds a 4-way stretch so your movement won't even know what restriction is, and the Nano-Air provides you protection from the wind and other elements as a result of its DWR finish and 60 grams of FullRange insulation. PRODUCT FEATURES: Two handwarmer pockets and two chest pockets are zippered, welted and low-bulk to wear comfortably with a harness or pack Sleek, low-bulk, snag-resistant cuffs use stretch knit for versatile coverage and comfort; a dual-adjustable drawcord hem seals in warmth 397 g (14 oz) Shell: 1.5-oz 30-denier 100% nylon ripstop Lining: 2-oz 50-denier 100% nylon plain weave Both with mechanical stretch and a DWR (durable water repellent) finish Insulation: 60-g FullRange 100% polyester stretch insulation