BEST ULTRALIGHT
The Kilo’s polyester taffeta lining is decadently soft, and because it has extra amounts of lofty 750-fill down in the feet and shoulders, it delivers on its temp rating. It’s so small and light one tester stashed it in her purse. 35°F, 1.3 lbs; rei.com
Bonus: Comes with an ultralight compression sack.
Bummer: Side sleepers, beware of stowing sharp items in the internal pocket.