Backpacking Sleeping Bag Reviews

The Sierra Designs Nitro 800 20-degree sleeping bag.

Review: Sierra Designs Nitro 20-Degree Sleeping Bag

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Three-Season Sleeping Bag
Sierra Designs Nitro 20-Degree
$320, 1 lb. 15 oz. (regular)
Sizes: men’s regular and long, women’s regular
sierradesigns.com

Choosing between sleeping bags can sometimes feel like getting the names of identical twins right—they look an awful lot alike. With bags, you can compare certain key specs: temperature rating, type and amount of insulation (or fill), total weight, and, of course, the price. Using those metrics, the new Sierra Designs Nitro bags look like a pretty good value, so I slept in the 20-degree Nitro 800 while camping on some cool and windy May nights at Idaho’s City of Rocks National Reserve, and on a three-night, 39-mile backpacking trip in Wyoming’s Wind River Range in mid-September, to see if its performance matches its impressive numbers.

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The REI Magma 10 sleeping bag in the Wind River Range.

Gear Review: REI Magma 10 and Magma 17 Sleeping Bags

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Three-Season Sleeping BagREI Magma 10 and Magma 17$349, 1 lb. 13 oz. (regular) 10° FSizes: men’s and women’s regular and longrei.com On the last night of a 40-mile May backpacking trip in Utah’s Dark Canyon, a friend and I slept out under the stars and a heavy dew fell during the night. But I didn’t notice it until after waking …

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Big Agnes Storm King 0 sleeping bag.

Review: Big Agnes Storm King 0 Sleeping Bag

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Winter Sleeping Bag
Big Agnes Storm King 0
$380, 3 lbs. 9 oz. (regular)
Sizes: regular and long ($400)
moosejaw.com

When is a mummy-style bag too constricting? I’ve used ultralight, three-season bags that felt a little too coffin-like. But in winter—or wintry conditions, such as you encounter when mountaineering in spring and summer—there are more practical reasons to use a bag with extra space, and you get it with the Storm King 0. Beyond its dimensions, the Storm King’s water-resistant down feathers, fairly unique “system” design that requires sliding an air mattress into a sleeve on the bag’s bottom side, and its relatively affordable price for this category of bags merits a close look.

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Gear Review: Marmot Ion 20 Sleeping Bag

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Marmot Ion 20 sleeping bag.
Marmot Ion 20 sleeping bag.

Sleeping Bag
Marmot Ion 20
$419, 1 lb. 13 oz. (regular)
Sizes: regular and long ($439)
moosejaw.com

Heading into Washington’s North Cascades National Park for an 80-mile backpacking trip in the last week of September, I didn’t want to take a chance on gear and clothing that might not stand up to cold, wet weather, maybe even sub-freezing nights and snow in that notoriously soggy mountain range. The hybrid-insulation Ion 20 fit the specs for that mission, thanks to its blend of high-quality down feathers and synthetic insulation and super warmth for such a lightweight bag.

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Gear Review: Big Agnes Boot Jack 25 Sleeping Bag

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Big Agnes Boot Jack 25 sleeping bag.
Big Agnes Boot Jack 25 sleeping bag.

Three-Season Sleeping Bag
Big Agnes Boot Jack 25
$190, 2 lbs. 6 oz. (regular)
Sizes: regular and long ($200)
moosejaw.com

Backpackers and campers shopping for a sleeping bag often focus on just a few specs: temperature rating, length, insulation type, and of course, price. They might not give consideration to construction, design, or how the bag fits—as in how much space you have to move around. They might not even bother to crawl inside to try it on. Sleeping in the Boot Jack 25 from Idaho’s Sawtooth Mountains and City of Rocks National Reserve to the Panamint Range of Death Valley National Park, I found it nearly true to its 25-degree temp rating, very competitively priced for its quality—and, just as importantly, it has fairly spacious dimensions, so I slept like a baby.

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