The Sierra Designs Backcountry Quilt 700 is an innovative quilt design that is super comfortable and larger than any other quilt, but unfortunately uses low fill power down that makes it heavy and bulky. At almost 2 lbs., it is the heaviest ultralight bag in this review, the one quality that kept it from being rated much higher overall. However, the silver lining is that with only 700 fill power down, the quilt will only set you back $250, making it the single most affordable ultralight sleeping bag. We loved its super wide zipper-less design because it was wide enough for two people (or one person and a dog) on warm nights, and on cold nights was big enough to wrap completely around oneself with no gap, something that could not be said about any other quilt design we tested.
The Backcountry Quilt 700 has been updated. Check out the details to follow.