Therm-A-Rest Hyperion 32 UL Sleeping Bag
UNLEASH PEAK PERFORMANCE ON YOUR ULTRALIGHT ADVENTURES WITH THE HYPERION 32 UL SLEEPING BAG
Weighing just 453 grams, the Therm-A-Rest Hyperion 32 UL Sleeping Bag delivers outstanding performance for ultralight missions.
Built for fast-moving adventures where every gram counts, the Hyperion 32F/0C is one of the lightest sleeping bags in its class. Targeted box baffled construction ensures warmth where it’s needed most, while premium materials keep the weight low without compromising comfort.
Designed to pack small and perform in the wild, the Hyperion offers a perfect balance of warmth, reliability and minimal bulk for those who like to move light and sleep well.
KEY FEATURES OF THE THERM-A-REST HYPERION 32 UL SLEEPING BAG
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Ultralight: One of the lightest in its class, the Therm-A-Rest Hyperion 32 UL Sleeping Bag sets a new standard for high-performance outdoor gear.
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900-fill Nikwax Hydrophobic Down™: Stays drier and maintains loft 60 times longer than untreated down.
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Unrivalled Packability: Lightweight materials and precise design allow for a smaller packed size than ever before.
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Box Baffled Construction: Uses mesh walls to maximise loft and minimise cold spots in key areas.
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Comfort Fit: Ergonomic shape and longer zipper offer a more human-friendly fit than other ultralight bags.
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SynergyLink™ Connectors: Integrate with a mattress for optimal comfort; removable for versatility.
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Zoned Insulation: Places fill where you need it most, 70% on the top and sides, 30% on the back, maximising warmth while saving weight.
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Responsible Down Standard Certified: Certification ensures humane treatment of waterfowl in the down supply chain.
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Size + Specifications
Regular
-Weight: 453g
-Width: 72cm
-Length: 203cm
-Fits: 183cm
-Girth: Shoulder - 145cm
Hip - 126cm
Foot Box - 109cm
-Packed Dimensions: 14cm x 15cm
Zip side - Left
Long
-Weight: 520g
-Width: 74cm
-Length: 216cm
-Fits: 198cm
-Girth, Shoulder: 147cm
Hip: 130cm
Foot Box - 117cm
Packed Dimensions - 14cm x 15cm
Zip side - Left
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What we think
The Hyperion sleeping bag has become one of our go-to pieces of gear for three-season camping. One of its smartest design features is the reduced insulation on the base—just 30%—which makes sense since the underside is compressed when you sleep, reducing its effectiveness anyway. To keep the warmest part of the bag on top, there are two ribbons that loop around your sleeping mat, which works surprisingly well and keeps everything in place all night.
The 900-fill-power Responsible Down Standard-certified Nikwax Hydrophobic Down is seriously impressive. It’s incredibly light yet retains warmth effectively, even in damp conditions. The box-wall construction and the DWR-treated 10D nylon ripstop shell give the bag a premium feel; the silky-soft fabric is a nice touch, especially after a long day outdoors.
We’ve found the temperature ratings to be pretty spot-on. With a comfort rating of 5°C and a limit of 0°C, it’s ideal for most of my trips. If you sleep warm, it can even handle milder winter conditions. At just 453g, it’s ridiculously lightweight for what it offers, and it doesn’t feel like I’m sacrificing comfort or warmth for the sake of weight savings.
Overall, the Hyperion strikes a great balance between being lightweight, functional, and luxurious. It’s definitely worth considering if you’re looking for a three-season bag that performs exceptionally well without weighing down your pack. -
Weight
453 g
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Fill Power
900
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Season Rating
3-Season
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Comfort Limit
0°C
"The Valley and Peak promise is built on three pillars: thoughtfully curated gear, exceptional customer service, and a genuine love for the outdoors. As an independent, family-run business, we carefully select products from a wide variety of cottage gear brands and trusted names, ensuring that each item is rigorously tested and loved by our team. Our customer service is a cornerstone of our brand, offering personalised support to help you choose and care for your gear with confidence"
Jim De'Ath, Managing Director