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.

  • Features

    • 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


    Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. 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. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
    View all REI Co-op Men's 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

  • Reviews
    51 reviews with an average rating of 4.5 out of 5 stars

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