Weight If you’re looking for the most warmth for the weight, budget be damned, the zero-degree Kuiu Super Down Sleeping Bag is it. Credit premium ingredients such as 865-fill down and 12-denier ripstop nylon, and vertical baffles, which use less material than horizontals. The result is a sub-2.5-pound toaster. Bonus: Two-way stretch means extra elbowroom.
Warmth Our cold-sleeping tester stayed warm in Chugach National Forest in single-digit temps, praising the fat hood, shoulder, and zipper draft tubes. “Once fully zipped in, it was like closing an oven door, and the draft tubes retained heat even when I rolled around,” says another.