Mammut Ajungilak Alpine 3-Season Sleeping Bag

THE SELL: High-end synthetic fill makes for a superlight (2.4-pound) wet-weather sleeper. THE TEST: This is the sleeping-bag equivalent of skinny jeans, but most testers didn't mind the snug fit. The synthetic insulation is a bit stiff—it feels more like a wool blanket than a down comforter—but testers found it surprisingly toasty. And compressible: on an Apostle Islands sea-kayak trip, it crammed perfectly into the pointy bow of the boat, and the DWR-coated shell fabric easily shed a heavy layer of dew. THE VERDICT: If you're traveling light and heading someplace wet, the weight savings is worth the narrow cut. 25º; 2.4 lbs.
: 5
Warmth-to-weight ratio: 4

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