Big Agnes Spike Lake 14 Degrees Mummy Down Sleeping Bag Regular Traditional mummy shaped bag without a pad sleeve DownTek&#8482; water repellent down insulation - warm, dry and environmental friendly Collar and side panels feature Insotect Flow&#8482; and body features traditional baffle construction No-draft collar seals around neck to keep cold air from sneaking in and No-draft zipper tube insulates along the length of the zipper Nylon stuff sack included