What is the lightest sleeping bag?

* Weight: 11.8 ounces

* Temperature rating: 0 degrees Fahrenheit

* Fill: 850-fill goose down

* Shell: 10D ripstop nylon

* Features: Adjustable draft collar, draft tube along the zipper, internal stash pocket

The Enlightened Equipment Enigma is the lightest sleeping bag on the market, and it's also one of the warmest. It's made with 850-fill goose down, which is the highest quality down available. The shell is made of 10D ripstop nylon, which is ultralight and tear-resistant. The Enigma has a number of features that make it ideal for backpacking, including an adjustable draft collar, a draft tube along the zipper, and an internal stash pocket.

The Enigma is a bit more expensive than some other sleeping bags, but it's worth the investment if you're looking for the lightest and warmest sleeping bag possible.