Therm-a-Rest Hyperion Sleeping Bag
Best ultralight sleeping bag for weight-conscious thru-hikers and backpackers.
This ultralight mummy bag is built for those who prioritize weight savings above all else. It offers an exceptional warmth-to-weight ratio, though the slim, restrictive cut is best suited for dedicated back sleepers.
$434.89
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Who it's for
- Ultralight backpackers counting every gram on the trail
- Hikers venturing into damp or unpredictable climates
- Minimalists needing extra room in their pack
Who should skip it
- Budget-conscious campers seeking value over performance
- Side sleepers preferring room to move at night
- Rough-and-tumble adventurers needing durable, tear-resistant gear
Performance breakdown
Weight-to-Warmth Ratio
Unmatched efficiency for ultralight backpackers prioritizing every single ounce.
Packability
Compresses down to a remarkably small footprint for tight pack spaces.
Moisture Resistance
Hydrophobic down treatment keeps loft intact even in damp backcountry conditions.
Thermal Efficiency
Zoned insulation and box baffling effectively eliminate cold spots while sleeping.
Integration Versatility
SynergyLink connectors keep you centered on your pad throughout the night.
Ergonomic Comfort
Slim cut saves weight but may feel restrictive for broader sleepers.
Key Specs
EN Comfort
32F
EN Limit
20F
What Reviewers Say
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