Lightest Sleeping Bag Ever.

The Arc Edge is an extreme bag in the true meaning of the word. So beware, this is not a mainstream piece of equipment.
In order to achieve the ridiculously low weight of 11 oz we had to make some radical decisions. We already have the lightest fill possible and we're offering cutting edge .85 oz rip stop fabric as an option in all other models, so how to trim the weight even further? Answer: use less of both.
We carefully reworked the pattern to be as snug as practically possible, while still allowing full body coverage. All excess got trimmed off. One of the underbody straps got eliminated. The foot box has been totally redesigned. This is definitely a sacrifice in comfort, particularly when the bag is strapped down for cold weather use. No more sprawling out with that feeling of space and freedom. Payback comes on the trail, when your pack is lighter.

Instead of making the Arc Edge sewn through like some of the cheap 'ultralights', we decided to retain full baffling but reduced the loft to one inch, thus making it a conservatively rated 40 degree sleeping 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.