A bag you can trust to get you through single-digit nights. The KSB 0's 650 fill power down top and synthetic fill bottom provides an exceptional warmth-to-weight ratio. When the temperature drops below freezing and into single digits， you need a bag that eliminates excessive air pockets to achieve lasting warmth through the night. Flexible Stretch Baffles keep fill next to your body and stretch when you move， while Length Locks allow you to adjust the bag to your height， creating a comfortable cocoon of fill around your feet. Additionally， anti-snag， 2-way YKK zipper opens from the bottom or top to easily control the flow of air.
650 fill power down top and synthetic fill bottom provides exceptional warmth-to-weight ratio
Anti-snag， 2-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
Mummy hood with draft collar and draw cord reduces draft
Packs down small with included compression sack
Stash pocket located inside bag for easy access
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