Mountain Equipment Helium 400 Sleeping Bag - Women's

$325.00 to $340.00
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On backpacking trips or cycle tours during cool spring and summer nights, the light and packable women's Mountain Equipment Helium 400 sleeping bag helps you sleep in blissful comfort.

  • Features

    • HELIUM™ 20 outer shell is very light and highly breathable
    • 367g of 90/10 pure duck down has a minimum fill power of 700
    • Alpine fit maximizes thermal efficiency
    • Slanted box-wall baffles throughout reduce weight from the sleeping bag's structure
    • Midlevel side seams afford great versatility whether the bag is laid on its front or back; they also improve even distribution of fill
    • 5-baffle anatomically shaped hood provides high levels of down control, low weight and excellent insulation
    • 4-baffle anatomically shaped and offset footbox restricts down migration while keeping weight and bulk to a minimum
    • Full-length Gemini™ zip baffle and integrated collar with Lode Lock™ closure
    • Comes with a waterproof roll-top stuff sack and storage cube
    • Certified to the Down Codex® standard, which promotes transparency and animal welfare in the down supply chain
    • Mountain Equipment is a member of Fair Wear Foundation, a European initiative working to improve workplace conditions in the garment and textile industry


    View all Mountain Equipment Women's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    27 degrees (F) - EN

    Tested Comfort

    37 degrees (F) - EN

    Temperature Rating (F)

    27 degrees (F)

    Temperature Rating (C)

    -3 degrees (C)


    Long - Left Zip: 1 lb. 15 oz.

    Regular - Left Zip: 1 lb. 14 oz.


    20-denier nylon

    Zipper Location

    Long - Left Zip: Left

    Regular - Left Zip: Left

    Insulation Type



    90/10 700-fill-power duck down

    Fill Weight

    Long - Left Zip: 14 ounces

    Regular - Left Zip: 13 ounces


    30-denier nylon

    Sleeping Bag Shape


    Fits Up To (in.)

    Long - Left Zip: 73 inches

    Regular - Left Zip: 67 inches

    Shoulder Girth (in.)

    60 inches

    Hip Girth (in.)

    52 inches

    Stuff Sack Size

    9 x 8 x 7 inches

    Stuff Sack Volume

    8 liters

    Compressed Volume




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