Designed to combine performance and value, this Big Agnes Greystone 0 degrees Sleeping Bag is the perfect companion on your next backpacking trip. It's the perfect mix of light weight, superior warmth, compressibility and comfort. 600 fill power DownTek RDS-certified down will keep you cozy down to a frosty 0 degreesF. 600 fill power DownTek insulation Recycled polyester ripstop shell and taffeta lining with PFAS-free water-repellent finish Traditional mummy shape allows for light weight and increased body heat retention Contoured hood follows the shape of your head for a more comfortable fit Oversized no-draft collar and no-draft zipper to keep the cold out Low-profile cordlock lets you un-cinch the hood with one hand Insulated tube along upper hood opening seals out drafts when cinched 65 inch YKK #5 anti-snag locking zipper for a smooth, quick zip Two-way zipper and zipper garage Left- and right-zip bags can be paired together Interior loops secure a liner for added warmth (sold separately) Exterior loops for hang drying or storage Order today!