Whether you're posted up by the campfire, enjoying your seventh s'more of the evening or cruising up one of Castle Rock's famed routes, the Patagonia Women's Nano Puff Insulated Jacket provides lightweight warmth. The Nano Puff boasts a tenacious exterior thanks to the recycled polyester shell and lining, which when combined keeps wind out and warmth in, while the DWR treatment prevents light precipitation from getting the best of your time spent outside. PrimaLoft Gold Eco maintains a moderate warmth-to-weight ratio, and ensures that you stay warm, even when wet. Additionally, the Nano is fashioned with a slightly more narrow fit than in years past, and the horizontal baffling isn't just a pretty face--it assures that the synthetic insulation stays in place for maximum warmth. The hem is fully adjustable with its low-profile drawcord, and the two zippered hand pockets keep necessities (like snacks and supplies) close by. A storm flap and zipper garage discourage chafing on your chin, and the internal chest pocket doubles as a stuff sack for the jacket, so you can stuff it, chuck it in your bag, and forget about it when temperatures start to warm up.