Ultralight Sleeping Bag
Therm-a-Rest Parsec 32

$400, 1 lb. 9 oz. (regular)

Sizes: unisex small, regular, and long


It was an amazing spot to sleep under the stars for our last night on an early-April backpacking trip in the Grand Canyon: perched on a plateau high above the Inner Gorge of the Colorado River, gazing across the canyon at the Tonto Plateau and South Rim. We waited until dusk had nearly faded to darkness to lay out our sleeping bags atop our completely exposed, flat cowboy-camping ledges, hoping the relentless, strong wind would abate with evening’s arrival and not threaten to launch our bags to New Mexico—but it didn’t. So I burrowed inside my Therm-a-Rest Parsec 32 for warmth—and only opened my eyes once or twice briefly during the night, enough to glimpse the brilliant glow of the Milky Way.

I stayed perfectly warm sleeping in this bag under the stars (no tent) for five nights on a six-day backpacking trip in the Grand Canyon in April, with lows in the 40s and low 50s F and strong winds some nights that made it feel chillier than the ambient air temps. That experience aligns with the Parsec 32’s EN temperature ratings of 41° F comfort, 32° F limit, and 5° F extreme.

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The Therm-a-Rest Parsec 32 sleeping bag hood.
” data-image-caption=”The Therm-a-Rest Parsec 32 sleeping bag hood.
” data-medium-file=”https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?fit=300%2C239&ssl=1″ data-large-file=”https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?fit=900%2C715&ssl=1″ width=”900″ height=”715″ src=”https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?resize=900%2C715&ssl=1″ alt=”The Therm-a-Rest Parsec 32 sleeping bag hood.” class=”wp-image-52608″ srcset=”https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?resize=1024%2C814&ssl=1 1024w, https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?resize=300%2C239&ssl=1 300w, https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?resize=768%2C611&ssl=1 768w, https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?resize=150%2C119&ssl=1 150w, https://i0.wp.com/thebigoutside.com/wp-content/uploads/2022/04/Therm-a-Rest-Parsec-32-hood.jpg?w=1200&ssl=1 1200w” sizes=”(max-width: 900px) 100vw, 900px” data-recalc-dims=”1″ />The Therm-a-Rest Parsec 32 sleeping bag hood.

It’s warm enough for typical overnight temps of summer in most mid-latitude mountain ranges or spring and fall in the Southwest canyon country except for people who tend to get cold more easily.

This bag’s nearly 12 ounces of PFC-free, 800-fill down creates four inches of loft, complemented by a warm, adjustable hood that closes snugly around your head and face, plus a draft collar and zipper tube and the thermal efficiency of a mummy design. Therm-a-Rest says the water-resistant Nikwax Hydrophobic Down absorbs 90 percent less water and dries three times faster than untreated, standard down feathers.

In practice, that translates
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