REI Co-op Down Time 0 Down Sleeping Bag

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The REI Co-op Downtime 0 sleeping bag offers lightweight warmth and engineering that balances room to move with insulation efficiency to keep you comfortable in your cold-weather camp.


  • Water-resistant, 650-fill-power duck down insulation offers excellent loft and warmth and is certified to the Responsible Down Standard (RDS) and bluesign® approved
  • Ripstop nylon shell has a durable water repellent (DWR) finish to protect the down from moisture
  • Relaxed fit from shoulders to hips gives you room to move in your sleep, but remains thermally efficient
  • Contoured hood, oversized insulated face muffler and full-length draft tube hold in warmth
  • Dual top/bottom neck yoke fully encloses your shoulders to prevent heat loss
  • Differentiated drawcords let you adjust hood and neck easily in the dark
  • Pad loops provide attachment points to keep your sleeping bag and pad together to avoid rolling off onto the cold ground (pad and straps not included)
  • Comes with nylon stuff sack and nylon mesh storage bag
  • Made in a Fair Trade Certified™ factory, which promotes safe working conditions and sustainable livelihoods
  • Made in a Fair Trade Certified™ factory
  • Contains materials that meet the bluesign® criteria
  • REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits


Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Our backpacking bags are rated for temperature according to an independent testing protocol: International Organization for Standardization (ISO) 23537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.

Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. For REI Co-op brand nongendered sleeping bags, we provide an overall temperature rating that falls between the Comfort and Lower Limit ratings.
View all REI Co-op Backpacking Sleeping Bags

Technical Specs

Best Use


Tested Lower Limit

-2 degrees (F) - EN

Tested Comfort

12 degrees (F) - EN

Temperature Rating (F)

0 degrees (F)

Temperature Rating (C)

-17 degrees (C)


Ripstop nylon

Insulation Type


Water-Resistant Down



650-fill-power duck down (RDS certified and bluesign® approved)



Sleeping Bag Shape





Down certified to the Responsible Down Standard (RDS)

Contains materials that meet the bluesign® criteria

Fair Trade Certified™ factory

From a Climate Neutral Certified brand

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