Mountain Equipment Helium 800 Sleeping Bag - Women's

$388.93to $403.93
Color: Medieval Blue
please select a Size
Choose a shipping method

A warm and lightweight choice, the women's Mountain Equipment Helium 800 sleeping bag is perfect for backpacking and trekking in cold, dry conditions.

  • Features

    • Light and highly breathable HELIUM™ outer shell is made from 100% recycled nylon with a PFC-free durable water repellent (DWR) treatment that sheds light moisture
    • Supersoft™ lining is made from 100% recycled nylon with a PFC-free DWR treatment
    • 700-fill-power pure duck down with a minimum down/feather ratio of 90/10 keeps you cozy and warm
    • Women's Alpine Fit with zoned EXL system maximizes thermal efficiency
    • Slanted box-wall baffles throughout
    • Midlevel side seams
    • 5-baffle anatomically shaped hood
    • 4-baffle anatomically shaped and offset foot-box
    • Full-length Gemini zip baffle with a 55 in. (140 cm) zipper and integrated neck collar with Lode Lock closure cut down on drafts
    • Includes a waterproof roll-top stuff sack and storage cube
    • Together with Fair Wear Foundation (FWF), Mountain Equipment is working to achieve fair working conditions worldwide


    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 Mountain Equipment Backpacking Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    5 degrees (F) - ISO

    Tested Comfort

    18 degrees (F) - ISO

    Temperature Rating (F)

    18 degrees (F)

    Temperature Rating (C)

    -8 degrees (C)


    Regular - Left Zip: 2 lbs. 8.2 oz.

    Long - Left Zip: 2 lbs. 9.9 oz.


    34 g, 20-denier HELIUM recycled nylon

    Zipper Location


    Insulation Type



    700-fill-power 90/10 pure duck down (90% down/10% feathers)

    Fill Weight

    Regular - Left Zip: 1 lb. 10 oz.

    Long - Left Zip: 1 lb. 11 oz.


    37 g, 20-denier Supersoft recycled nylon

    Sleeping Bag Shape


    Fits Up To (in.)

    Regular - Left Zip: 67 inches

    Long - Left Zip: 73 inches

    Shoulder Girth (in.)

    60 inches

    Stuff Sack Size

    9 x 12 inches




    Contains recycled materials

  • Reviews
    0 reviews

    Loading Reviews...
  • Questions & Answers

    Loading Questions...