Mountain Equipment Helium 250

From £198.00
£220.00
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A superb down bag at a price that won't break the bank and weighing less than most bottles of water and packing down equally small, this is the perfect bag for the summer backpacker looking to lighten their load. It should give a good night's sleep in temperatures as low as 1°C (for men) and 3°C (for women).

Mountain Equipment Helium 250

Regular Left Zip
£198.00
£220.00
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1 In Stock
Regular Right Zip
£198.00
£220.00
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Women's Left Zip
£198.00
£220.00
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Women's Right Zip
£198.00
£220.00
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Long Left Zip
£216.00
£240.00
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1 In Stock

A superb down bag at a price that won't break the bank and weighing less than most bottles of water and packing down equally small, this is the perfect bag for the summer backpacker looking to lighten their load. It should give a good night's sleep in temperatures as low as 1°C (for men) and 3°C (for women).

  • 100% recycled Helium 20D outer shell is very light and highly breathable with PFC free DWR.
  • Fill is 90-10 Pure Duck Down with a minimum USA fill power of 700.
  • Alpine Fit 2.0 improves comfort and maximises thermal efficiency (Zoned EXL system in the Women's).
  • Slanted box-wall baffles throughout.
  • Mid-level side seams.
  • Five baffle anatomically shaped hood.
  • Four 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 and inner, Down fill.

ME Helium 250 Fill Weight Internal Length Shoulder Width Foot Width Packed Size Weight
Regular 261g 185cm (6' 1") 75cm 50cm 19cm x 17cm x 15cm 660g
Long -g 200cm (6' 7") 75cm 50cm - -g
Women's 242g 170cm (5' 7") 75cm 50cm 19cm x 17cm x 15cm 600g
ME Helium 250
Fill: 700+ USA fill power duck down
Comfort: 
Comfort Limit:
Extreme:
7ºC 
2ºC
-12ºC
 
EN Sleeping Bag Temperature Ratings
EN13537 is the European standard for sleeping bags and requires a thermal manikin test which produces four temperature results — upper limit, comfort, lower limit and extreme. There is no legal obligation to use this standard though most reputable brands do, even non-European ones. There is an exemption for military sleeping bags and sleeping bags for extreme temperatures, ie a comfort range of below -25°C. 
Upper Limit: the temperature at which a standard man can sleep without excessive perspiration. It is established with the hood and zips open and with arms outside the bag.
Comfort: the temperature at which a standard woman can expect to sleep comfortably in a relaxed position.
Lower Limit: the temperature at which a standard man can sleep for eight hours in a curled position without waking.
Extreme: the minimum temperature at which a standard woman can remain for six hours without risk of death from hypothermia (though frostbite is still possible).
For the purpose of these measurements, a "standard man" is assumed to be 25 years old, with a height of 1.73m (ie 5' 7", not very tall) and a weight of 73kg; a "standard woman" is assumed to be 25 years old, with a height of 1.60m (ie 5' 2.5") and a weight of 60kg.

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