DESIGN & DETAILS: The KSB Double sleeping bag is designed with 650 fill power down top and synthetic fill bottom that provides exceptional warmth-to-weight ratio and enough room for two to sleep comfortably through the night Built with individual draft covers, hoodsnap, and two-way zippers running along each side Flexible Stretch Baffles keep fill next to your body and stretch when you move, while Length Locks(TM) allow you to adjust the bag to your height, creating a comfortable cocoon of fill around your feet Additionally, anti-snag, two-way YKK zipper opens from the bottom or top to easily control the flow of air Built-out foot box for plenty of comfort where it's needed most Bag top is removable for full-size down comforter Mummy hood with draft collar and draw cord reduces draft Packs down small into an included compression sack Stash pocket located inside bag for easy access