The Mountain Equipment Helium 400 Down Sleeping Bag is an incredibly light, versatile and packable sleeping bag that's well suited to backpacking and cycle touring. It will still happily cope with cooler nights during the spring and summer months.

Updated for Spring 2022, this bag features recycled materials and an improved fit.


  • 100% recycled HELIUM 20D outer shell is very light and highly breathable with PFC free DWR
  • 367g of 90-10 Pure Duck Down with a minimum fill power of 700
  • Women's Alpine fit with zoned EXL® system 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 with 140cm zip and integrated neck collar with Lode Lock closure
  • 100% recycled Supersoft 20D lining fabric with PFC free DWR
  • Supplied with waterproof roll-top stuff-sack and storage cube
  • 100% Polyamide outer/inner, Down fill


  • Good night’s sleep temperature: -3°C
  • Comfort: 0°C
  • Comfort Limit: -6°C
  • Extreme: -24°C
  • Weight:870g / 30.7oz (Long)
  • Standard Pack Size: 24cm x 21cm x 20cm 

We aim to ship out all orders placed before 2pm the same working day! For shipments in the United Kingdom mainland, we use Royal Mail Tracked 24 service (DPD Next Day for larger items and items that weigh over 4KG). Please see our shipping policy for more details.

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Mountain Equipment Helium 400 Long Down Sleeping Bag

RRP: £270.00 (Save £40.01) £229.99

Item is in stock Only 0 left in stock Item is out of stock Item is unavailable

SKU: ME-006058-01635
Barcode: 5053817251658


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