Greystone 30°

Took this backpacking last weekend and the mummy shape really kept the warmth in without feeling suffocating. It packs down small enough to strap to the outside of my pack, which I didn't expect at this price.

Slept comfortably in this on a chilly night in the low 40s and stayed warm all the way through. The mummy shape really cuts down on dead air space, and it squishes down small enough to strap to the bottom of my pack.

Took this on a three-night backpacking trip and it packed down small enough to barely notice in my pack. Stayed warm down to about 35 degrees and the mummy hood cinched tight without feeling claustrophobic.