ARC GHOST • $307 • WEIGHT: 16 ounces with Epic Shell; 13 ounces with nylon shell
The Arc Ghost is a sophisticated, high-tech down comforter that tapers from head to toe and has a foot “pocket.” On cold nights, you can tighten two straps under the comforter, drawing it close, or secure it to a foam pad, locking the sleeping bag in place. On warmer nights, you can leave the straps loose and float the comforter over you. The Arc Ghost is hoodless, so you need your own head gear, but it does have a drawstring.
Like the Sierra Designs Wicked Light (also reviewed here), the Arc Ghost is best in a tent or bivy sack—out in the open, wind can blast through the gap between the bag and pad. The Arc Ghost, along with the Feathered Friends Vireo, was the biggest surprise of the bunch, comfortably going down to 30 degrees. Yet, when the bag’s top and bottom straps are loose, it’s comfortable even in summer, making it very versatile. If you want to use the Arc Ghost in a snow cave or in full conditions, choose the weather-resistant Epic or Pertex shell. For tent and desert use, the .85-ounce nylon shell shaves a few ounces.
The Arc Ghost fits over Nunatak’s Arc Alpinist bag, adding another 30 degrees in warmth. Nunatak also makes the Arc Ghost with a wider foot pocket to fit over a three-season bag, converting it into a sub-zero toaster.
PROS Most versatile bag—warm to just below freezing, but airy and comfortable for summer use. Your choice of shell fabrics and colors.
CONS No hood. Requires a tent or bivy sack in wind. The most expensive bag tested.
RECOMMENDED USE Three-season camping and alpine bivies to below freezing.