3°C

Montbell Seamless Down Hugger 800 Sleeping Bag #5

Montbell

Seamless Down Hugger 800 Sleeping Bag #5

SKU:: SS22811
Weighs:: 493g
Fill Power:: 800
Down Treatment:: Standard
Comfort Limit:: 3°C
Insulation Type:: Down
Zip Length:: 3/4 Length
Zip Position:: Right Zip
Type:: Mummy

£224.99

RRP: £318.99

| You save: £94.00 (29%)

20% VAT deducted at checkout for goods delivered outside of the UK

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Product Details

Jump to: Our Verdict / Features / Specifications

The Seamless Down Hugger is a pretty revolutionary sleeping bag. The use of spider yarn instead of baffles to hold the down plus elasticated inner results an amazing level of stretch. This is an extremely lightweight high performance sleeping bag using the highest quality materials available. This is an impressive bag!

Montbell says:

Our state-of-the-art sleeping bag design achieves cutting edge performance without adding extra weight. The baffle-less outer design allows for unrestricted loft while the interior elasticized stitching pulls the bag closer to the body without making you feel constricted. Sleeping in the backcountry has never felt so good.

By placing a web-like layer of polyester yarns throughout the bag, we created a system that traps down and holds it in place. The system successfully eliminates seams on the outer fabric, preventing heat loss through the seams.

Our Verdict

Montbell's Seamless Down Hugger 800 Sleeping Bag #5 is a unique sleeping bag for a number of of reasons. Firstly, the baffle-less construction which is immediately clear to see. Montbell have developed a technique where they use threads of yarn to catch the down, a concept based on the spider web.

All of the bags we've seen and tested so far have worked really well in keeping down in place and reducing cold spots. The second feature is the spiral stretch system which allows you to move around in the bag more as the fabrics have enough stretch to make movement easier and less restrictive.

It is quick to loft and feels warm as soon as you're in the bag. The 10D fabric is one of the ways that weight is saved but it does mean that extra care is needed. It uses a full length, sturdy zip so access is much easier than many other bags. The hood and collar can be cinched separately which is good and the toggles are on the inside for easy of use.

Overall, this bag looks great and performs really well.

- Reviewed by Ultralight Outdoor Gear

(Unfortunately, we are unable to ship MontBell products outside of the UK)

Features

Spider Baffle System
Super Spiral Stretch System (inside, US. Patent NO. 7,900,301)
Hood Adjuster with draw cord for face hole adjustment
Insulated zipper flap prevents cold air from coming in
Two-way right or left hand mating zipper (67 in / 170 cm)
Auto locking zipper to limit zipper "slip" during the night
Anti-snagging slider cover
Triangle gusset to reinforce at the end of the zipper
Tapered stuff sack included
Storage /laundry net sack included

Specifications

Temperature Rating

EN13537:2012 Comfort: 8°C / 46°F
EN13537:2012 Comfort Limit: 3°C / 37°F

Regular Specs

Weight: 493g (excludes storage bags)
Max user height: 6 ft / 183 cm
Compressed size: 12 x 24cm

Material & Construction

Insulation: 800 Fill Power EX Down
Shell: 10-denier Ballistic Airlight nylon taffeta (100% Nylon, water repellent finish) Spider yarn (93% polyester + 7% Nylon)
Zipper: Two way zipper (170cm)

At Montbell, we source down from both the European and Asian markets to satisfy a variety of characteristics (supply/availability, low cost, consistent quality, humane practices, etc.) and maintain our lofty standards. Every season we seek to balance the superior quality for which we are known and the lowest possible raw materials cost. We change down sourcing companies frequently to insure that our customers have access to superior products at the lowest price possible. In the course of these efforts, Montbell never purchases down from operations that practice “live-plucking” methods. We only utilize down plumes and feathers collected as a by-product of water fowl raised to meet the demands of the food industry.

We will continue to look for sources of down that maximize value to our customers and allow Montbell products to perform at the highest level.

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Seamless Down Hugger 800 Sleeping Bag #5

£224.99

RRP: £318.99

| You save: £94.00 (29%)

To prevent down from shifting and producing cold spots, sleeping bags have been traditionally made with inner walls called baffles. The Seamless Down Hugger series is the world's first sleeping bag to remove the traditional baffles. This radical construction technique produces a sleeping bag with a single, continuous chamber and allows the down to loft to its fullest potential. This technique doesn't affect the lightweight and compact nature that Montbell's sleeping bags have become known for. The next generation of sleeping bag is here!

A Eureka Moment - Eliminating the baffles

We asked ourselves, "Is there anything we can do to improve down's ability to insulate?" As ideas were being tossed around, one idea that came up was, by eliminating the baffles the down would be unhindered and each down ball could loft/puff out to its fullest ability. This extra volume of air trapping down would thereby increase the insulative properties of the bag. However, the catch is baffles prevent down from shifting out of place. When down shifts out of place, cold spots can form. This is when there is a spot in the sleeping bag that has no down coverage.

If baffles prevent cold spots, how does eliminating them improve warmth?

Our first reasoning was that if you give down more room to loft, we increase the layer of trapped air and we can improve the insulating performance of the down. Another reason, since sewing baffles into the sleeping bag creates holes in the outer fabric, the sewing holes are ways for warm air to escape. By eliminating most of the sewing lines on the bag, we are able to trap more air. However, in order to make our idea a reality, we have to remove the baffles and come up with a way that could hold the down in place. This was the biggest hurdle we faced when trying to reach that next step.

Spider Yarn: a specialized thread that entangles down

When looking for a suitable baffle replacement we received a little inspiration from nature, the spider. The thought was, "If we could make a web inside the sleeping bag, it could suspend the down and hold it in place, keeping the down from shifting." Based on this initial concept, work began on developing a specialized thread that could trap and hold down. Calling this new thread "Spider Yarn," we were successfully able to suspend a layer of down throughout the entire bag. This new construction is the "Spider Baffle System."

Excellent stretch to provide better sleep

The Spiral Stretch System (US.Patent No.7,900,301) is what made Montbell sleeping bags famous. The ability of the bag to move with you during the night has provided comfort for many. The Seamless Down Huggers are no different. Although the exterior of the bag is a solid piece of fabric, the interior of the bag features a combination of the fabric's mechanical stretch and elastic stitching. The result, the sleeping bag hugs and moves with you as you sleep, but doesn't feel restrictive. This also means that as you move, gaps between you and the sleeping bag are less likely to form and maintains even coverage of the sleeping bag, maintaining your warmth.

Ultralight Fabric

This ultra thin, lightweight fabric is strong for its weight. Because each individual thread is super thin and supple, the fabric is so light that it creates little resistance, allowing the down to fully loft.