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

The Helium GT 400 Long sleeping bag is incredibly light for its ability to handle light frost. It is designed for long journeys and thanks to its generous cut, it is extremely comfortable and ideal for those who like to sleep on their side or back. The "long" version has an extended size for adventurers between 185 and 200 cm tall.



700+ fill power duck down. The down-to-feather ratio is 90/10. The loose fit of the GT Fit sleeping bag is spacious, comfortable and allows for variable sleeping positions.

The construction of the sleeping bag consists of angled Z-baffles filled with down, ensuring minimal heat loss. The anatomically shaped 5-baffle hood with down can be perfectly tightened around the head. The footbox is shaped like a trapezoid for insulation – Trapezium 4 with four down-filled chambers. Each chamber has a precisely determined amount of down.

The 100% recycled outer fabric of the sleeping bag HELIUM™ 20D is light, highly breathable and water-repellent (hydrophobic). The 100% recycled inner fabric of the sleeping bag Supersoft™ 20D is very soft and pleasant to the touch.



The long zipper with a Lode Lock™ slider prevents accidental opening. Thanks to the two sliders, a ventilation opening can be created in the zipper to regulate the climate in the sleeping bag in case of higher temperatures than the sleeping bag is designed for.

The sleeping bag comes with a waterproof compression sack with a waterproof closure. For storage, the sleeping bag includes a spacious cube-shaped mesh sack.



Brand: Mountain Equipment

Gender: unisex

Good Night Sleep (GNS) rating: -5 °C

COMFORT temperature: 0 °C

LIMIT temperature: -6 °C

EXTREME temperature: -24 °C

Total weight: 930 g

Down weight: 472 g

Packed volume: 10.1 l

Packed size: 24x21x20 cm

Fit: GT Fit

Foot insulation: Trapezium 4 chambers

Hood: 5 chambers

Down type: duck

Fill power: 700+

Down ratio: 90/10

Baffles: Angled Z-baffles

Outer shell fabric: HELIUM™ 20, 34g/m², 20D 100% Recycled Nylon

Membrane: no

Water resistance: water-repellent

Outer fabric thread count: 20

PFC free DWR (outer fabric): yes

Inner fabric: Supersoft™ 20, 37g/m², 20D 100% Recycled Nylon

PFC free DWR (inner fabric): yes

Left zip: yes

Right zip: no

Zipper type and length: YKK® #5 Coil 2-way, 140cm

Compression sack: Waterproof compression sack

Storage sack: yes