The Big Agnes Buell 30 Sleeping Bag - Regular delivers technical, lightweight performance to excel on and off the trail with a high thermal value and comfort wherever you go. It has a trafitional mummy shape, and the contoured hood follows the shape of your head for a more comfortable fit. The Buell is filled with Fireline Pro Synthetic Insulation made from multi-denier, short-staple fibers with high loft to efficiently trap heat. These silky fibers provide a soft feel and great compression for packability. You'll easily secure yourself inside the bag with its two-way, anti-snag locking zipper with garage.