Rab Neutrino 400 Sleeping Bag - Women's

Color: Blue
Size: Regular - Left Zip
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Built with recycled nylon and insulated with 800-fill-power down, the women's Rab Neutrino 400 sleeping bag is great for spring and summer mountaineering, lightweight backpacking, or bikepacking.


  • Shell fabric is 38 g, 20-denier Pertex® Quantum recycled ripstop nylon with a fluorocarbon-free durable water repellent (DWR) finish
  • Lined with 30 g, 20-denier recycled nylon
  • 800-fill-power European goose down with Nikwax fluorocarbon-free hydrophobic finish
  • Down is RDS-certified
  • Weight-saving chevron baffle design reduces down migration and optimizes core warmth
  • Trapezoidal box wall construction with differential cut helps to maximize loft and warmth
  • Adjustable neck baffle provides a close fit for decreased heat loss
  • YKK 3/4-length main zipper has a synthetic-filled baffle to trap warmth
  • YKK zipped internal stash pocket
  • YKK antisnag zipper insert and antisnag internal zip guard


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. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. 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. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
View all Rab Backpacking Sleeping Bags

Technical Specs

Best Use


Tested Lower Limit

19 degrees (F) - ISO

Tested Comfort

30 degrees (F) - ISO

Temperature Rating (F)

30 degrees (F)

Temperature Rating (C)

-1 degrees (C)


1 lb. 10.9 oz.



Zipper Location


Insulation Type


Water-Resistant Down



800-fill-power goose down

Fill Weight

14.2 ounces



Sleeping Bag Shape


Fits Up To (in.)

66.9 inches

Shoulder Girth (in.)

61.4 inches

Hip Girth (in.)

52.8 inches

Stuff Sack Size

7.5 x 15.3 inches




Contains recycled materials

Down certified to the Responsible Down Standard (RDS)

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