Gear Overview: Therm-a-Relaxation Hyperion 32F Sleeping Bag


Ultralight Sleeping Bag
Therm-a-Relaxation Hyperion 32F/0C
$360, 1 lb. 1 oz. (common)
Sizes: small, common, lengthy

Why spend more cash on a sleeping bag?
Logical query, in fact. However for any backpacker desirous to shave a pound or
extra and vital gear quantity from his or her backpack, an ultralight down
bag provides among the finest methods of realizing that goal—in addition to delivering
most heat per ounce. And one of many lightest and most compact luggage on this
class, Therm-a-Relaxation’s Hyperion 32F/0C, measured up in each method on a six-day
backpacking journey within the Grand Canyon and
on chilly, wet spring nights that pushed the bag’s limits tenting in Could in Idaho’s
Metropolis of Rocks Nationwide Reserve.

Hyperion’s EN consolation ranking of 41° F/5° C and restrict ranking
of 32° F/0° C
proper according to my expertise: Sleeping in a tent on the Metropolis of Rocks on a
evening that dipped into the excessive 30s, I used to be heat sufficient in underwear, socks, and
a heat, long-sleeve high, however felt just like the bag was at its consolation restrict for me.
(Word: I don’t get chilly very simply, so somebody who does won’t wish to push
this bag’s—or any bag’s—consolation restrict.) Within the Grand Canyon in early Could,
nights solely dropped to round 50° F, a temperature for which the bag was
snug unzipped.

Therm-a-Rest-Hyperion-32F/0C sleeping bag.
Therm-a-Relaxation-Hyperion-32F/0C sleeping bag.

with simply a half-length zipper (for
weight financial savings), you may’t actually open it up and use it as a blanket on very
gentle nights. Nonetheless, I discovered it fairly practical on gentle nights unzipping it as
far because it opens, tucking my toes and decrease legs (which typically don’t
overheat) contained in the bag’s backside half, and opening the higher bag to make use of as a
blanket over a part of my torso.

The bag’s design locations 70 p.c of the insulation on the
high and sides and 30 p.c on the underside/again
facet—splendid for again
sleepers, a bit much less so for facet sleepers (like me), though my again didn’t
really feel noticeably colder. The draft collar
and comfortably close-fitting, adjustable hood
gave me a pleasant, cosy seal on
these chilly nights on the Metropolis of Rocks, whereas the light-weight zipper strikes as easily as any I’ve seen on a sleeping
bag, and doesn’t snag.

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Therm-a-Rest-Hyperion-32F/0C sleeping bag.
Therm-a-Relaxation-Hyperion-32F/0C sleeping bag.

The Hyperion is filled with 9
ounces (within the common) of 900-fill down—the
highest-rated down you’ll find—which interprets to extra heat and packability
than most luggage of the identical weight (and successfully, since few luggage are this
mild, it’s as heat as luggage a number of ounces to a pound or extra heavier). In accordance
to Therm-a-Relaxation, the waterproof Nikwax
Hydrophobic Down
used on this bagretains
its loft as much as 60 occasions longer, absorbs 90 p.c much less water, and dries three
occasions sooner than commonplace down. Field-baffled
makes use of mesh partitions to maximise loft and decrease chilly spots, and
the ThermaCapture lining encompasses a
reflective coating that will increase the bag’s thermal effectivity with out including
weight or bulk.

Therm-a-Rest-Hyperion-32F/0C sleeping bag.
Therm-a-Relaxation-Hyperion-32F/0C foot finish.

match is beneficiant

on the hood, shoulders (57-inch girth), and thru the hips (49.5-inch girth) for
an individual of common construct, although a
little cosy within the legs
(43-inch girth on the footbox).

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Therm-a-Rest-Hyperion-32F/0C bag stuffed.
Therm-a-Relaxation-Hyperion-32F/0C bag stuffed.

The 10-denier ripstop nylon shell cloth, handled with a DWR (sturdy,
waterproof coating) to repel moisture, is as mild as bag shells get—deal with
it with care to keep away from tears—however my bag has seen no harm and shouldn’t with
smart use. Two detachable straps on the bag’s backside facet enable integrating it with an air mattress
(additionally most helpful for again sleepers). It comes
with a compression stuff sack
and packs
right down to roughly twice the scale of a liter bottle
—a lot smaller than most
equally rated luggage.

There’s additionally a Hyperion 20F/-6C model ($410, 1 lb. 6 oz.).


mild and compact as any down bag will get lately, the Therm-a-Relaxation Hyperion 32F/0C packs
an enormous warmth-per-ounce ratio and is an efficient worth for ultralighters, thru-hikers,
or any backpacker who desires to sleep comfortably at evening and carry much less weight on the path.

BUY IT NOW You possibly can help my work on this weblog by clicking any of those hyperlinks to buy a Therm-a-Relaxation Hyperion 32F/0C sleeping bag at,, or, or a Therm-a-Relaxation Hyperion 20F/-6C at,, or

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all of my
reviews of sleeping bags
that I like and all of my
reviews of backpacking gear
, and my articles “Pro
Tips for Buying Sleeping Bags
” and “10
Pro Tips: Staying Warm in a Sleeping Bag

I examined gear for Backpacker Journal for 20 years. At The Large Exterior, I
evaluation solely what I think about the very best out of doors gear and attire. See my Gear Evaluations web page at The Large
Exterior for categorized menus of all of my opinions and my professional shopping for suggestions.



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