SLEEP WARM IN COLD TEMPERATURESMinimizing weight and space on gear-intensive trips is important, but so is not getting frostbite in the middle of the night. Take care of both problems with the Big Agnes Blackburn UL 0 Degree Down Sleeping Bag. Whether you're backpacking through high-altitude ranges in summer or going on a ski touring hut trip, the Blackburn UL is the ideal way to stay warm without tacking on too much extra bulk. Down insulation keeps you comfortable through below-freezing temperatures while making the bag lightweight and highly compressible. The down is treated with DownTek to protect it from loft-compromising moisture. Just to be safe, the soft and smooth ripstop fabric is treated with a DWR coating to repel any wayward drips and drops. A full-length pad keeps your sleeping pad from shifting throughout the night, and it maximizes thermal efficiency by protecting you from the frozen ground. Big Agnes also included an integrated pillow pocket to keep your camp pillow in place, and you can even stuff it with spare layers when you really want to go minimalist. The Free Range hood and No-Draft collar, wedge, and zipper prevent cold air from slipping in through the cracks. Plus, the vaulted, tapered footbox gives your toes room to wiggle without creating large cold air pockets. FEATURESA warm, roomy bag that minimizes weight and bulkSculpted contour improves insulation performance850-fill down offers excellent warmth-to-weight ratioDownTek maintains insulating value in wet conditionsIntegrated pad sleeve keeps sleeping pad in placeFree Range hood lets you lift head without adjustmentLeft- and right-zip bags can be mated togetherInterior fabric loops for sleeping bag linersTECH SPECSStuff Size: [stuffed] 9 x 20in, [compressed regular] 7 x 8in, [compressed long] 8 x 9inClaimed weight: [regular] 2lb 12oz, [long] 3lbMaterial: ripstop nylon with DWR coating, [lining] nylon taffetaHip Circumference: [regular] 63in, [long] 66inFoot Circumference: 52.5in