Mountain Equipment Helium 400 XXL Down Sleeping Bag

-3°C Comfort Limit, 467g of 700+ Fill Power Down
Weighs 1020g (excluding stuff sack)
Code: SS18141
  • Now £259.99
  • (FREE UK & EU Delivery)
+ In Stock Now | Usually dispatched within 24 hours

We're working out what we think - we'll add our view here!

Mountain Equipment says:

The 'gran turismo' of the Helium range. Wider and longer and offering exceptional comfort and performance for long-distance backpacking and trekking.

We're working out what we think about Mountain Equipment's Helium 400 XXL Down Sleeping Bag, we'll add our comments here in due course.

- Reviewed by Ultralight Outdoor Gear

Help and advice:Choosing a sleeping bag adviceEN 13537 rating for sleeping bags explainedAll about down filling in sleeping bags
Sleeping bag shape and sizes adviceSleeping Bag features Page 1Sleepin bag features page 2
  • HELIUM 20 outer shell is very light and highly breathable
  • 467g of 90-10 Pure Duck Down with a minimum fill power of 700
  • Alpine fit maximises thermal efficiency
  • Slanted Box-Wall baffles throughout
  • Mid-level side seams
  • 5 baffle anatomically shaped hood
  • 4 baffle anatomically shaped and offset foot-box
  • Full length Gemini zip baffle and integrated collar with Lode Lock closure
  • Supplied with waterproof roll-top stuff-sack and storage cube
  • Weighs: 1020g (excludes stuff sack)
  • Comfort: 3°C/37°F
  • Comfort Limit: -3°C/27°F
  • Good Nights Sleep Guaranteed*: -5°C/23°F
  • Extreme: -19°C/-2°F
  • Fill Weight: 467g / 16oz
  • Pack Size: 26cm x 23cm x 20cm
  • Length: 220cm/87in
  • Width: 84cm/33in
  • Foot width: 57cm/22in

*Mountain Equipment use their own 'Good Nights Sleep Guaranteed' rating which they believe is a more accurate number for some sleeping bags and is based not just on the EN test results but on lab testing, their own use, thermal imaging and cold chamber work, along with a lot of data analysis.

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