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The Arc Edge is an extreme in the true meaning of the word.

To achieve the ridiculously low weight of 11 oz we had to make some radical decisions. How do you trim total bag weight when already using the lightest materials available? Answer: use less of said materials.

We carefully reworked the pattern to be as snug as practically possible, while still allowing full body coverage. All excess was removed. One underbody strap was eliminated. The foot box was totally redesigned. These changes compromise comfort somewhat, particularly with the quilt layered up for cold weather use.But the payback comes on the trail, when your pack is several pounds lighter.

Instead of making a sewn through Arc Edge, we decided to retain full baffling but reduced the loft to 3/4 inch, thus making it a conservatively rated 40 degree bag. If you're a warm sleeper, this has proven to be plenty for a summer bag used mostly at the middle altitudes of for instance the Pacific Crest Trail or the John Muir Trail.


  40° F
Fits to height 5'4" 5'10' 6'4"
Useable width:




fill weight 5oz 5.5oz 6oz
total weight,
quantum .8
9oz 10oz 11oz
total weight,
Quantum 1.0
10oz 11oz 12oz
Total weight,
epic by nextec
11oz 12oz 13oz
stuffed size 6x6 6x7 6x8
baffle height .75" .75" .75"
price $339 $365 $399

Go here for more information about this backcountry quilt and Nunatak's Arc Concept.

To learn more about our down sleeping bags in general, read this

To help you decide which shell fabric will work best for you, see here

This page is about care, maintenance and storage of down equipment.


Nunatak is dedicated to custom design and manufacture of quality back country sleeping bags and garments
utilizing 800+ goose down and sophisticated fabrics.

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