– The Backcountry Ski Site
  • Avalanches
  • Gear Reviews
    • Ski Reviews
    • Boot Reviews
    • Binding Reviews
    • Snowboard Splitboard
    • Book Reviews
    • Avalanche Beacon Reviews
    • Airbag Backpacks
    • Backcountry Electronics
    • Misc Gear Reviews
  • Podcast
  • Tips & Tricks
    • Ski Touring Basics
    • Boot Fitting
    • Fitness & Health
    • Gear Mods
  • Trip Reports
    • Fourteeners
    • Huts – Cabins – Lodges
    • Denali McKinley
    • 8,000 Meter Skiing
  • Stories
    • History
    • Humor
    • Land Use Issues
    • Evergreen Ski Touring
    • Poetry
  • Resources
    • All Posts Listed
    • 100 Recent Comments
    • Backcountry Skiing & Ski Touring Webcams
    • Ski Weights Comparison
    • Archives of WildSnow.com
    • Authors Page
    • Ski Touring Bindings
      • Trab TR2 Index and FAQ
      • Salomon Guardian & Tracker
      • Naxo Backcountry Skiing Bindings – Info Index
      • Silvretta Pure Backcountry Skiing Bindings – Info Index
      • Marker F10-12 Duke Baron
      • G3 Onyx Ski Binding FAQ
      • G3 ION Ski Touring Binding
      • Fritschi Backcountry Skiing Bindings – Info Index
      • Fritschi Diamir Frame Bindings Mount DIY
      • Fritschi Diamir Bindings FAQ
      • Fritschi Tecton FAQ
      • Atomic Salomon Backland MTN
      • Dynafit Tri-Step Binding 2001-2003
      • Naxo randonnee alpine touring AT ski binding FAQ
      • Dynafit Skiing Bindings – Info Index
      • Dynafit Binding Frequently Asked Questions FAQ
      • Dynafit Beast 16 FAQ Review 1
      • Dynafit Beast 16 FAQ Page Two
    • History
      • Ski Touring Binding Museum
      • Trooper Traverse Intro & Index
      • Randonnee Ski Touring “AT” ski gear — What is Hip?
      • Chronology
    • Backcountry Skiing Core Glossary
    • Gear Review Policy & Disclosures

– The Backcountry Ski Site

  • Avalanches
  • Gear Reviews
    • Ski Reviews
    • Boot Reviews
    • Binding Reviews
    • Snowboard Splitboard
    • Book Reviews
    • Avalanche Beacon Reviews
    • Airbag Backpacks
    • Backcountry Electronics
    • Misc Gear Reviews
  • Podcast
  • Tips & Tricks
    • Ski Touring Basics
    • Boot Fitting
    • Fitness & Health
    • Gear Mods
  • Trip Reports
    • Fourteeners
    • Huts – Cabins – Lodges
    • Denali McKinley
    • 8,000 Meter Skiing
  • Stories
    • History
    • Humor
    • Land Use Issues
    • Evergreen Ski Touring
    • Poetry
  • Resources
    • All Posts Listed
    • 100 Recent Comments
    • Backcountry Skiing & Ski Touring Webcams
    • Ski Weights Comparison
    • Archives of WildSnow.com
    • Authors Page
    • Ski Touring Bindings
      • Trab TR2 Index and FAQ
      • Salomon Guardian & Tracker
      • Naxo Backcountry Skiing Bindings – Info Index
      • Silvretta Pure Backcountry Skiing Bindings – Info Index
      • Marker F10-12 Duke Baron
      • G3 Onyx Ski Binding FAQ
      • G3 ION Ski Touring Binding
      • Fritschi Backcountry Skiing Bindings – Info Index
      • Fritschi Diamir Frame Bindings Mount DIY
      • Fritschi Diamir Bindings FAQ
      • Fritschi Tecton FAQ
      • Atomic Salomon Backland MTN
      • Dynafit Tri-Step Binding 2001-2003
      • Naxo randonnee alpine touring AT ski binding FAQ
      • Dynafit Skiing Bindings – Info Index
      • Dynafit Binding Frequently Asked Questions FAQ
      • Dynafit Beast 16 FAQ Review 1
      • Dynafit Beast 16 FAQ Page Two
    • History
      • Ski Touring Binding Museum
      • Trooper Traverse Intro & Index
      • Randonnee Ski Touring “AT” ski gear — What is Hip?
      • Chronology
    • Backcountry Skiing Core Glossary
    • Gear Review Policy & Disclosures
   

Minimalist Approach to Warmth — Mountain Equipment Helium 250 Sleeping Bag

by Louie Dawson July 1, 2014
written by Louie Dawson July 1, 2014

Shop for Mountain Equipment sleeping bags.

Sunrise over the south west side of Stuart on the approach hike.

I woke up shivering, soaking wet, without a sleeping bag, lying on a ledge high on the granite massif of Mt. Stuart here in the Cascades. It wasn’t an unplanned bivy, or an emergency. Instead, I was shivering in the name of light-weight, in my unwillingness to lug a heavy pack.

Two days previously, my climbing partner Kirk and I had weighed the decision of carrying our heavy sleeping bags up the route, as opposed to significantly lightening our packs. In the warm comfort of my living room it was an easy decision to not bring the sleeping bag, just an emergency blanket bivy sack. Up on the mountain, I wasn’t so sure. But I did know my standard 0 degree bag would have been overkill, so after that night I became convinced of the utility of a super-light summer bag.


This year I’ve been testing out the Mountain Equipment Helium 250 sleeping bag, one of ME’s lightest bags. The bag cuts weight in all possible ways, resulting in a fairly warm, 25 ounce unit. The packed bag is about the size of a small bread loaf. It is rated for a comfortable night’s sleep at 32F (0C), with an “extreme” rating of 5F (-15C). The Helium is stuffed with 280 grams of 750 fill down (check this out for details on down fill ratings). It also features a complex baffle system, and a tight cut (saves additional weight for a skinny guy like me; might not fit everyone).

This is the first bag I’ve owned that is rated for a higher temperature than 15F. I’ve always been wary of ultra-lightweight sleeping bags opting instead for the insurance of heavier, warmer bags. I often carry minimal warm clothes on overnight trips, reducing weight a bit to allow for a big warm bag. A good night’s sleep is important, and in the event of an emergency, having a super warm bag can be essential. However, a light, low insulation bag has its place.

Three of Mountain Equipment's lightweight bags.  Helium 250 in the middle.

Kept us warm at the Asulkan Hut on Rogers Pass. Helium 250 in the middle.

I’ve had the Helium for a few months now and used it on a variety of trips. It’s perfect for hut trips, as it’s small, but still warm enough to stay cozy when the cabin gets a little colder in the middle of the night. Originally I thought the bag would be good for huts, warm summer trips, and little else. But on a few overnight trips this winter the little stuff-sack proved too tempting, and I took it instead of my heavy winter bag. With some careful techniques, the bag kept me sufficiently warm on a late winter and spring campouts. The bag is also small enough to easily carry while traveling, which I’ve found useful for couch-surfing, and unplanned nights in airports.


How to day warm at high camp while keeping your pack light?  Testing ground: Rainier, Kautz Camp 2.

How to stay warm at high camp while keeping your pack light? Testing ground: Rainier, Kautz Camp 2.

Of course, being a down bag, the Helium’s major weakness is water. On all my trips I’ve been careful to keep the bag as dry as possible, so moisture hasn’t been an issue. However, I’ve purposefully not brought it on trips without a tent, or with any chance of getting the bag wet. Also, the zipper, fabric, drawstring of the bag are lightweight and hence don’t seem all that durable. I’ve been careful with the bag and I tend to be fairly easy on my gear, so I haven’t had any issues so far. But it’s something to be aware of.

Other thoughts about water: Perhaps this type of sleeping bag should be constructed using water resistant down, which would make it safer for alpinism. Water resistant down can be less lofty, but once a bit of moisture comes into the picture the fluffiest down available starts to collapse anyway, and quickly gets dangerous. Further, perhaps the outer shell could be a super lightweight membrane type fabric that would be more water resistant. The Helium shell does repel water in a “bead off” fashion, but most certainly is not water resistant enough to block persistent wetting. (If I’d brought it on Mount Stuart, to be safe I probably would have used a waterproof, breathable bivy sack as well to protect it from moisture.)

I originally thought this sleeping bag would have limited use, only as a light bivy bag or for trips in warmer climes. However, since I got the Helium I’ve used it more than any other bag I have, and it’s not even deep summer yet! I’m looking forward to testing it out on summer climbing and hiking trips.


(WildSnow Editor’s note: A reliable source from Mountain Equipment tells us they offer another bag which is essentially the same as the Helium but more waterproof. The Matrix range of sleeping bags have both waterproof down (on the top of the bag) and Primaloft (on the bottom). The Matrix I is heavier than the Helium 250 (32oz vs 25oz) mainly because of the Primaloft on the bottom (which increases comfort when sitting on wet snow or other damp surfaces). The Matrix I is also slightly bulkier but Mountain Equipment designed it specifically for bivy use like Louie is referring to in the beginning of this review. According to Mountain Equipment, Matrix I could be used without a bivy sack on a misty belay ledge or in a drippy snow cave, but not if you’re not trying to sleep in a rainstorm.

Shop for Mountain Equipment sleeping bags.

Shop for 12 oz. waterproof breathable bivy sack here.

Louie Dawson

Louie Dawson earned his Bachelor Degree in Industrial Design from Western Washington University in 2014. When he’s not skiing Mount Baker or somewhere equally as snowy, he’s thinking about new products to make ski mountaineering more fun and safe.

wildsnow.com
0
Email
previous post
Blizzard Altitude Ultralight Touring Ski–Review
next post
Summits and Smugglers–Sulzfluh 2014

Trip Reports

  • A Small Hut for Big Skiing in the San Juans: Aladdin’s Lamp

    April 23, 2024
  • Revisiting a 2011 Trip Report: Adventure in the Pickets — Thread of Ice Ski Descent

    December 9, 2022

Avalanche Department

  • Ask a Forecaster: Q&A with CAIC’s Andrew McWilliams

    March 10, 2024

Tips & Tricks

  • Transition Efficiencies 101 with Tech Binding Heel Units

    January 6, 2023
  • Visualizing the Backcountry as a Splitboarder: Minimizing the Challenges of Movement by Anticipating Terrain

    December 5, 2022
  • TURBOCHARGE YOUR TRAILHEAD BEACON CHECK

    November 15, 2022

Recent Comments

  • Daniel on Backcountry Ski Boots Buyer’s Guide: The Touring Boots Worth the Money
  • Jim Milstein on Best Touring Packs for Guides and Daytrippers
  • Bergen Tjossem on Much more than a steep ski: Fischer Transalp 92 CTI Long-Term Review
  • Maciej on Much more than a steep ski: Fischer Transalp 92 CTI Long-Term Review


  • Facebook
  • Twitter
  • Instagram
  • About Lou Dawson
  • Terms of Service
  • Authors Page
  • About
  • Contact
  • Advertise
  • Copyright & Legal
  • Website Security

@2025 - All Rights Reserved. Designed and Developed by WildSnow


Back To Top

Read alsox

Wolverine Split Sticks: A Terrific Telescopic...

January 2, 2025

Do Raide Research packs live up...

March 20, 2024

A Pullover Hardshell for Spring Tours?...

February 20, 2024