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Mountain Equipment Helium GT 400 sleeping bag, Long, anvil grey

-10%
409  -10%
RRP 454 
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From 29.01.2026 (Thursday) Check availability
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Delivery method on Friday 30.01.2026
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The Helium GT 400 Long sleeping bag is incredibly light, to the point that it can handle even mild frost. Designed for long journeys, the generous fit makes it extremely comfortable and ideal for both side and back sleepers. The "long" version has an extended size for adventurers with a height of 185 to 200 cm.

Duck feathers with a filling of 700+ cuin. The ratio of down to down is 90/10. The loose cut of the GT Fit sleeping bag is spacious, comfortable and allows for variability in sleeping positions.
The construction of the sleeping bag consists of slanted Z-chambers filled with feathers, ensuring minimal heat loss. The anatomically shaped hood of 5 chambers with feathers can be pulled down around the head. Trapezoid shaped foot insulation - Trapezium 4 with four chambers with feathers. Each chamber has a precisely determined amount of feathers.
The 100% recycled surface fabric of the HELIUM™ 20D sleeping bag is light, highly breathable and water-repellent (hydrophobic). The 100% recycled inner fabric of the Supersoft™ 20D sleeping bag is very soft and pleasant to the touch.

A long zipper with a Lode Lock™ lock on the slider prevents unwanted unzipping. Thanks to two sliders, it is possible to create a ventilation hole in the zipper and thus regulate the climate in the sleeping bag in case of more heat than the sleeping bag is designed for.
The sleeping bag comes with a waterproof compression pack with a waterproof closure. For storage, the sleeping bag includes a spacious mesh bag in the shape of a cube.

Brand: Mountain Equipment
Gender: unisex
Good sleep guarantee (GNS): -5 °C
COMFORT temperature: 0 °C
Temperature LIMIT: -6 °C
Temperature EXTREME: -24 °C
Total weight: 930 g
Feather weight: 472 g
Packaged volume: 10.1 l
Packaged state: 24x21x20 cm
Fit: GT Fit
Leg insulation: Trapezium 4 chambers
Hood: 5 chambers
Feather type: duck
Feather fill: 700+
Down ratio: 90/10
Chambers: Beveled Z-chambers
Surface material: HELIUM™ 20, 34g/m², 20D 100% Recycled Nylon
Diaphragm: no
Waterproofing: water repellent
Fiber strength of the outer fabric: 20
PFC free DWR (surface material): yes
Inner material: Supersoft™ 20, 37g/m², 20D 100% Recycled Nylon
PFC free DWR (inner material): yes
Left zipper: yes
Right zipper: no
Type and length of zipper: YKK® #5 Coil 2-way, 140cm
Compression pack: Waterproof compression pack
Storage case: yes

Product details
Sex Unisex
Colour gray
Filling down
Temperature determination three-season, winter
Sleeping bag shape mummy
Sport hiking, camping
product ID 184729
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Honesty, responsibility and deep respect for the mountains, the environment and nature. These are the values of the British brand Mountain Equipment, which has been part of countless expeditions and climbs to the highest peaks in the world since 1961. For more than 60 years, it has been producing top quality equipment for the most daring mountaineering and polar expeditions to the most inhospitable places on the planet. It prides itself on premium materials and is a major development partner of the GORE-TEX membrane manufacturer

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