Mountain Equipment Helium GT 800 Long sleeping bag, Anvil Grey

Choose the right sleeping bag

Mountain Equipment's range of down sleeping bags is really wide. From ultralight summer sleeping bags to expedition sleeping bags for extreme conditions. We have therefore developed a brief guide that will help you find your way and choose the right down sleeping bag.

Guide to choosing a down sleeping bag.

Quality sleep is one of the basic requirements for full regeneration during any outdoor activity. The Mountain Equipment HELIUM GT 800 LONG down sleeping bag is designed for long trips where you expect cold nights. Thanks to its generous cut, it is particularly comfortable and ideal for those who like to sleep on their side or back. It weighs a very pleasant 1360 g, while you can sleep comfortably in it at -16 °C. Suitable for sleeping in a tent, winter room or just outside under a shelter. You get a 10-year warranty on the sleeping bag.

• The 100% recycled surface material HELIUMTM 20 D is light, highly breathable and wind-resistant and treated with a PFC-free water-resistant DWR treatment.
• 892 g of duck down 90/10 with a minimum fill of 700 cuin.
• GT Fit cut - spacious and comfortable, allows sleeping in different positions.
• Slanted chambers – for maximum thermal efficiency with minimal weight.
• Optimized feather distribution and precise volume for each chamber separately.
• Anatomically shaped hood with 5 chambers.
• Anatomically shaped and beveled foot area from 4 chambers.
• Full-length zip side gusset and integrated neck collar with simple Lode Lock™ magnetic closure.
• Extended size for people 185cm tall and over.
• Supplied with waterproof case and storage net.

HELIUM 20 – 100% recycled, very light, easy to pack

Helium 20 material is 100% recycled, exceptionally light, packable, soft and at the same time very durable. The high density of the weave does not let feathers through, it is windproof and prevents heat loss. Thanks to the water-repellent DWR treatment without PFC, it is additionally resistant to water. This material is ideal where light weight and packability are the most important factors.

• Extremely light - 38 g/m2.
• Highly breathable.
• Wind resistant.
• The 100% recycled SUPERSOFTTM 20 inner material is chosen for its low weight, high breathability, exceptional durability and pleasant touch. It is also a feather-proof material.
• Low weight (37 g/m2)
• High breathability
• Durability

Quality duck feathers with 700+ fill

Very high-quality duck feathers originating from China contain at least 90% down, its filling is at least 700 cuin and meets the ethical DOWN CODEX®. The feathers are gently cleaned with water without chemical treatment. This destroys mites and the environment for their life, which will be appreciated by allergy sufferers. Feathers retain their important fatness and loft, are packable well, have high insulation and low weight.

• 892 g of feathers.
• Minimum filling 700+ cuin.
• Down ratio 90:10.
• Complies with DOWN CODEX®.
• Long life.

Construction details of the sleeping bag

In each chamber, the amount of feathers is precisely calculated per gram for minimum weight and maximum warmth. This innovative "chamber by chamber" approach was developed by Matt Fuller, the only outdoorsman to hold a PhD in feather research.

Structurally exceptional insulation - the so-called Body-mapping takes into account the needs of each part of the body separately. That's why Matt Fuller calculated the exact feather density in each chamber separately.
Not a single gram of heat escapes – The beveled chambers minimize heat loss through the seams and keep the feathers in place, without migration in the chambers. Heat stays in the sleeping bag thanks to the elimination of thermal bridges in the seams through which heat escapes.

3D hood without the need to pull it down - the hood is shaped to protect the head even without pulling it down. 5 chambers prevent feather migration, protect your head from heat loss and thus ensure a pleasant sleep. If you need to remove the hood, no problem. By the shape of the cord, you know exactly whether you are pulling the upper part of the hood (flat cord) or the lower part of the hood (round cord).

Ergonomic shape for the feet - the feet need to be insulated as best as possible, because they get little blood flow. The bottom of the sleeping bag is tapered in the shape of a trapezoid and the tip area is raised like a shark's fin. Thanks to this ergonomic shape, you will not press the chamber in the leg area with your feet and the insulating properties that keep your feet warm will not be lost. The bottom of the sleeping bag is made of the warmest V-chambers and is so complicated that it is made separately and then sewn to the sleeping bag.

The feathers used for the bottom of the sleeping bag and on the hood have a higher filling density, which prevents moisture from penetrating deeper into the chamber. You will appreciate this when sleeping in a grave, when in contact with a wet wall or when there is condensed moisture in a tent.
Protective 3D collar around the neck - to prevent heat from escaping from the sleeping bag, there is a down 3D collar on the inside that fills the space around the shoulders and neck. That's how the sleeping bag is "plugged". There is less feather density in the collar to precisely mold to the shape of your shoulders and neck. All the same, a magnetic stud that you can put on and take off intuitively with one hand.

Insulation pad under the zipper - the weakest point of sleeping bags is usually the zipper. The triangular bed is filled with feathers and synthetics, which adheres to the sleeping bag. The synthetics prevent the feathers from moving along the leg and at the same time insulates even when wet. The zipper is located in the lower half of the sleeping bag so that the heat that rises up does not escape through the zipper.

YKK® zipper with automatic lock

In the Mountain Equipment sleeping bag, you will not experience the unpleasant feeling of waking up at night with the zipper open, because it has a zipper lock and will not unzip on its own. With a simple pull, you release the lock and open the sleeping bag only when you want.

It works even after freezing - a high-quality zipper from the manufacturer YKK® is used for comfortable fastening without snagging. This particular zipper works without problems even in the cold and you can rely on it at any time.

What will you get with your purchase?

Sleeping outside can be both a pleasant experience and a nightmare. However, investing in a quality down sleeping bag from Mountain Equipment is well worth it. You will get a guarantee of satisfaction, because 55 years of experience in the development of sleeping bags has enabled the Mountain Equipment brand to create sleeping bags that have no analogues in the world.

• Feathers from sustainable production - DOWN CODEX®.
• Comfortable temperature for good sleep - GOOD NIGHTS SLEEP GUARANTEED -16 °C.
• Service – post-warranty repairs, cleaning and impregnation.

Pleasant sleep even in the cold

The HELIUM GT 800 LONG sleeping bag is very easy to pack and has a pleasant weight of 1360 g. Thanks to its spacious cut, it is very comfortable even when sleeping in any position. It is intended for sleeping in winter in winter rooms, cottages and wherever you don't have to worry about too much humidity or rain. You can use it all year round with complete certainty of comfort.

A guarantee of good sleep

If you buy this sleeping bag and it is not warm enough for you, you can exchange it for a warmer model. You can try the sleeping bag within 30 days of purchase, and if it doesn't feel warm enough, exchange it for a higher model. Just come, bring an undamaged sleeping bag, pay the difference for a higher model and that's it!
Mountain Equipment quotes a " Good Night Sleep Guaranteed " value on every sleeping bag and for this model the value is -16°C. This value was measured using real-world conditions and takes into account factors such as wind and humidity.

Service across time

Everyone tries to avoid a situation where they tear or otherwise damage their sleeping bag. It is unpleasant and in that case Mountain Equipment will repair your sleeping bag at its nearest service center in Munich. The repair normally takes up to 14 days, and the sleeping bag will be returned to you fully functional.

Color: Anvil Grey
Length of the sleeping bag: 207
Type of insulating material: feathers
Feather type: duck
DWR (Durable Water Repellent): yes
Extreme: -36
Good night sleep: -16
Comfort: -8
Comfort limit: -15
Compression package: yes
Adjustable hood: yes
Storage case: yes
Number of chambers in the hood: 5
Number of chambers in the area of ​​the feet: 4
Down ratio: 90/10
Pulling the collar: yes
Fit: GT fit
Chamber type: Oblique
Size: LZ
Outer fabric: Helium 20D
Inner pocket: no
Manufacturers: Mountain Equipment