With its high-performance water-repellent DownTek insulation, water-resistant shell, and thermally-efficient semi-rectangular cut, the Big Agnes Blackburn UL 0 Degree sleeping bag is built for 4-season backpacking.
The bag is insulated with premium 850 fill DownTek insulation. Down insulation has long been renowned for its compressible properties and efficiency in delivering an excellent warmth-to-weight ratio. The shortcoming of down has been its susceptibility to the effects of moisture, losing much of its performance qualities when wet or damp. DownTek insulation utilizes nano technology and a proprietary application process to provide water-repellency and both anti-microbial and anti-bacterial protection. Nylon ripstop shell fabric features a water-repellent finish and provides lightweight durability. A nylon taffeta lining provides next-to-skin comfort. Insotect Flow technology is used to help eliminate cold spots and regulate the movement of down inside baffles to offer better body heat distribution
In a traditional sleeping system, the bag lies on top of a sleeping pad. In this configuration, many people find themselves rolling off the pad at night. Not only that, but the insulation on the bottom of the bag is often compressed by the sleeper's weight and, once compressed, the fill loses most of its insulating properties. The Big Agnes System is different and joins the bag and the pad together. A Flex Pad Sleeve on the bottom of the bag accommodates pads of varying lengths, widths, and thicknesses and ensures that the pad stays beneath you. It also enables the pad to deliver warmth and it allows Big Agnes to save weight and bulk by only lightly insulating the bottom of the bag itself. You'll stay warm and you can roll and move comfortably during the night without ever worrying about slipping off of your pad.
The bag is designed to be used with 20"-25" wide Big Agnes sleeping pads (sold separately) with an R-value or suggested temperature range to match the bag's temperature rating. Big Agnes does recommend using a rectangular pad for optimal performance.
The bag also features a contoured and insulated hood, an internal "barn" to keep a pillow (sold separately) comfortably beneath your head, a roomy footbox, a no-draft collar, and a draft tube behind the anti-snag side zipper. There are internal loops that enable you to use a liner (sold separately) and external loops for drying or storing the bag when not in use.
Available in Short (fits up to 5' 5"), Regular (5'10") , and Long (6' 6") size options, the Big Agnes Blackburn UL 0 Degree sleeping bag includes a mesh storage sack and a stuff sack.
