Backpacking Sleeping Bag Reviews

The Marmot Hydrogen 30 in southern Utah's Owl Canyon.

Pro Tips For Buying a Backpacking Sleeping Bag

By Michael Lanza

Finding a sleeping bag that’s right for you may be the most confusing gear-buying task. Getting the right one is critical to sleeping comfortably in the backcountry—and in an emergency, your bag could save your life. But with the myriad choices out there, how do you tell them apart, beyond temperature rating and price? This article will explain how to evaluate the key differences between bags to make your choice much more simple.

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A backpacker overlooking the Colorado River on the Tonto Trail east of Bass Canyon, along the Gems Route in the Grand Canyon.

The Best Backpacking Gear of 2025

By Michael Lanza

Utah’s High Uintas Wilderness, Montana’s Beartooths, and Colorado’s Weminuche. Glacier National Park and the Tetons. The Grand Canyon (repeatedly). The Canadian Rockies. Southern Utah’s Owl and Fish canyons. The Wind River Range. The John Muir Trail and Wonderland Trail. Iceland’s Laugavegur and Fimmvörðuháls trails. These are just some of the places where I’ve recently tested the backpacking gear and apparel that I’ve reviewed at The Big Outside—so that I can give you honest and thorough, field-tested opinions that help you find the best gear for your adventures.

And that’s exactly how I came up with the following picks for today’s best backpacking gear.

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Sea to Summit Spark Pro -9C/15F ultralight sleeping bag.

Review: Sea to Summit Spark Pro -9C/15F Sleeping Bag

Ultralight Sleeping Bag
Sea to Summit Spark Pro -9C/15F Bag
$649, 1 lb. 11 oz./765.4g (regular)
Sizes: unisex regular and long ($689)
seatosummit.com

We woke up from our first night in Colorado’s San Juan Mountains in mid-September, at well over 10,000 feet beside a creek that sang soft lullabys to us all night, to find ice crystals in our water bottles and one full water bladder that had been left outside the tent partly frozen. But the overnight temperature dropping to below freezing had hardly registered with me as I slumbered soundly zipped up inside my Sea to Summit Spark Pro -9C/15F sleeping bag—one of the warmest for its weight, most packable, and well constructed ultralight sleeping bags you’ll find.

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A young boy in a sleeping bag while backpacking in Sequoia National Park.

10 Pro Tips For Staying Warm in a Sleeping Bag

By Michael Lanza

Head into the mountains in summer, or almost anywhere in fall or spring, and you can encounter nighttime and morning temperatures anywhere from the 40s Fahrenheit to well below freezing. That’s more than cold enough to pose a real risk of hypothermia or, at the least, result in a miserable night for you or a partner or child you’ve taken backpacking or camping—and would like to take more. Here’s the good news: The very simple techniques outlined in this article can turn a potentially unpleasant night into a comfortable one.

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The Marmot Hydrogen 30 ultralight sleeping bag.

Review: Marmot Hydrogen 30 Sleeping Bag

Ultralight Sleeping Bag
Marmot Hydrogen 30
$399, 1 lb. 9.4 oz./720g (regular)
Sizes: unisex regular and long ($419)
backcountry.com

For backpackers prioritizing low gear weight who don’t tend to get cold very easily, a sleeping bag rated 30 degrees Fahrenheit can function as their go-to for most three-season trips. And Marmot’s Hydrogen 30 remains one of the perhaps three highest-quality and warmest ultralight mummy bags at this temperature rating, as I affirmed sleeping in it for two nights on southern Utah’s Owl and Fish canyons loop in early May and five nights hiking in both Montana’s Beartooth mountains and on the Grand Canyon’s Gems Route in mid-April.

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