Akula Half Bag.

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A waist high sleeping bag to be used with our mountain parkas as a complete sleep system. In 35° or 20° ratings.

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A compact waist high sleeping bag in 35° or 20° to be used with our mountain parkas as a complete system for 3 season or high altitude bivouacs.

For more than half a century the climbers of the European Alps have embraced this concept for one or two night forays into the hills. Nunatak has given new life to idea of the historic 'Elephant's Foot' with the Akula. 

High tech fabrics, 900FP down and Nunatak's supreme craftsmanship makes the Akula superior to the crude chopped off sleeping bags of the old mountaineers.

This seemingly odd sleep system combining a short bag with a full strength down parka is so warm and versatile that it has become the Nunatak staff's preferred 3-4 season overnight climbing setup. With the 20° Akula it matches a 15 to 20 degree mummy bag in warmth, but wearing the parka full time makes all camp chores a less numbing experience.

We leave our arms in the sleeves and simply stick the hands inside the Akula or in the parka pockets.
For sitting or limited space no other system works better, save for maybe the Raku, another Nunatak exclusive.

4 choices in length and two footbox sizes, besides the full suite of Nunatak technical fabrics, round off the custom features.

Temperature Rating20° F / -7° C
Baffle height2.5"
Inside length40" - 45" - 50" - 55"
Shoulder width optionsN/A
Foot Area Circumference38" - 42"
Differentially cut liner/shellNo. Custom option only
Fill Weight, size Medium8.9 oz
Weight, 0.66 Membrane shell/liner, 38" foot40"L : 12.3 oz --- 45"L : 13.4 oz --- 50"L : 14.6 oz --- 55"L : 15.7 oz

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Akula Half Bag.

Akula Half Bag.

A waist high sleeping bag to be used with our mountain parkas as a complete sleep system. In 35° or 20° ratings.

Product Options
Temperature Rating
The 20° is a solid 3 season sleeping bag.
Inside length
The Akula works best if the top reaches at least to the belly level. For sitting use add a size.
Footbox Size
The 38" footbox fit most normal sized feet without footwear.
Shell Fabric

Please go to the Fabric Page for help choosing the shell material.

Liner Fabric
Down Type
Choosing Hyper-Dry moisture resistant down will help combat the effects of perspiration, misting tents and damp air. Nunatak products made with Hyper-Dry down will have a slight increase in bulk over those made with regular down. In some instances they may contain an additional 5% of fill weight.
Down Overfill
Cold sleeper? Consider adding a few ounces of extra fluff.