11 Best Sleeping Bags (2026): Ultralight, Warm Weather, for Kids
The outer shell uses a 30-denier recycled polyester ripstop with an inside liner made from 20-denier recycled polyester taffeta. It does a good job of holding back the moisture that often forms inside a tent, which I discovered after one very soggy night of testing. The fill is what Nemo calls Zerofiber insulation, which is made from 100 percent postconsumer recycled content fibers. The Zerofiber packs down remarkably small—this is the most compact synthetic-fill bag I've tested in this temp range—and retains its ability to trap warmth even when wet.
What I like most about this bag, and nearly all of Nemo's sleeping bags, is the wider cut through the torso area down to the knees. Like the Therm-a-Rest Questar above, this bag is almost a hybrid of a mummy bag and your father's good old 1970s square sleeping bag. Which is to say, this bag is roomy. The downside...
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