Mountain Equipment Firefly Down Sleeping Bag

-1°C Comfort Limit, 274g of 800+ Fill Power Down
Weighs 590g (Regular bag)
Code: SS18135V
  • Now From £334.99
  • (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:

As efficient a bag as it is possible to make. Inspiring confidence even when water turns to ice, this ultralight bag will pack a punch in any high mountain environment during the late spring and summer.

We're working out what we think about Mountain Equipment's Firefly 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
  • Plasma 10D outer shell is incredibly light and exceptionally breathable
  • 274g of 90-10 Russian Goose Down with a minimum fill power of 800
  • Alpine fit with EXL system improves loft and maximises thermal efficiency
  • Slanted box-wall baffles throughout
  • Ground level side seams
  • 7 baffle low volume anatomically shaped hood
  • 4 baffle anatomically shaped and offset foot-box
  • Full length Gemini zip baffle
  • Plasma 10D inner throughout
  • Supplied with waterproof roll-top stuff-sack and storage cube
  • Weight: 590g (excludes stuff sack)
  • Length: 190cm/75in
  • Width: 75cm/30in
  • Foot width: 50cm/20in
  • Weight: 618g (excludes stuff sack)
  • Length: 205cm/81in
  • Width: 75cm/30in
  • Foot width: 50cm/20in
  • Comfort: 4°C/39°F
  • Comfort Limit: -1°C/30°F
  • Good Nights Sleep Guaranteed*: -1°C/30°F
  • Extreme: -16°C/3°F
  • Fill Weight: 274g / 10oz
  • Pack Size: 25cm x 19cm x 16cm

*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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