Mountain Equipment Firelite (435)

From £450.00
£500.00
Save 10%

For ultra-light backpacking and alpinism it is difficult to conceive a bag so reliably warm being any lighter. With 900+ fill power down and optimised fit, it is perfect for high mountain use during the summer and at lower altitudes in spring and autumn. It should give a good night's sleep in temperatures as low as -9°C (for men).

Mountain Equipment Firelite (435)

Regular Left Zip
£450.00
£500.00
Save 10%
2 In Stock
Long Left Zip
£477.00
£530.00
Save 10%
1 In Stock

For ultra-light backpacking and alpinism it is difficult to conceive a bag so reliably warm being any lighter. With 900+ fill power down and optimised fit, it is perfect for high mountain use during the summer and at lower altitudes in spring and autumn. It should give a good night's sleep in temperatures as low as -9°C (for men).

  • Plasma 10D fabrics throughout are incredibly light and breathable with PFC free DWR.
  • Fill is 90-10 Goose Down with a minimum USA fill power of 900.
  • Alpine Fit 2.0 improves comfort and maximises thermal efficiency.
  • Slanted box-wall baffles throughout.
  • Ground level side seams.
  • Seven baffle anatomically shaped hood.
  • Four baffle anatomically shaped and offset foot-box.
  • Full length Gemini zip baffle with 140cm zip and integrated neck collar.
  • Plasma 10D inner throughout with PFC free DWR.
  • Supplied with waterproof roll-top stuff-sack and storage cube.

100% Polyamide outer and inner, Down fill.

ME Firelite Fill Weight Internal Length Shoulder Width Foot Width Packed Size Weight
Regular 436g 185cm (6' 1") 75cm 50cm 25cm x 21cm x 20cm 770g
Long -g 200cm (6' 7") 75cm 50cm - -g
ME Firelite
Fill: 900+ USA fill power goose down
Comfort: 
Comfort Limit:
Extreme:
-2ºC 
-8ºC
-26ºC
 
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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