Marmot Women's EcoPro 15 $165
The 15-degree EcoPro is made with a new 80 percent recycled synthetic insulation and 100 percent
recycled polyester shell fabric. But it compresses and insulates as well as comparable synthetics
and comes with a microfleece-lined collar and a stash pocket. 15°F, 3 lbs; marmot.com
Lafuma Warm'n Light 600g Down Lady $110
It's slightly dubious that a bag that packs down to the size of a tennis shoe can keep you warm,
but even on a 38-degree night, you'll be snug. Credit the 650-fill down insulation and an additional
interior foot pouch that can be pulled over your toes. 40°F, 1.6 lbs; lafumausa.com
Rab Women's Atlas 750 $325
With more than a pound and a half of 610-fill down evenly distributed in arced baffles,
this bag has serious loft and feels like a feather bed. And it's equally toasty: The external
draft collar is plush, while the articulated foot area allows ample wiggle room to warm up your
digits. 10°F, 3.7 lbs; rab.uk.com
Mammut Kira 3 Season $160
Synthetic bags tend to have worse weight-to-warmth ratios than down.
But the 25-degree Kira comes much closer than most, thanks in large part
to the bag's unusual internal-collar design, which snaps around the neck but
still leaves plenty of space for claustrophobes. 25°F, 4.1 lbs; mam mutusa.com
-KATE SIBER
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