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Therm-a-Rest

Hyperion 20 UL Bag Sleeping Bag

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Colour: Deep Pacific Blue
Deep Pacific Blue
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Ultralight down bag for high-performance warmth

Going fast and light on the trail or in the hills means shaving every possible gram without sacrificing vital functionality. The Hyperion 20°F/-6°C is among the lightest sleeping bags in its class, designed to cope with 2-3 season conditions without sacrificing performance. But when packed down into its compression stuff sack, it is impressively compact, allowing you to carry it with ease, even in a small rucksack. It’s designed to work with an insulated sleeping mat to keep you warm, with zoned fill that strategically places more of the premium 900 fill-power down on the top and sides of your body, leaving your mat to do its job underneath. It’s also fitted with removable SynergyLink connectors – basically, thin elasticated straps that keep your bag attached to your mat (no more sliding around in the night). But plenty of attention has also been paid to comfort too, with super soft fabrics, an ergonomic shape and a longer zipper to give you a better night’s sleep compared to the highly tapered ‘performance mummy’ fit of most cramped ultralight bags

    • 2-3 season sleeping bag with EN Comfort limit of 0°C/32°F and EN Lower limit of -6°C/20°F
    • One of the lightest pieces in its class, the ultralight Hyperion offers exceptional warmth-for-weight
    • Employs ultra-premium 900-fill power moisture-resistant Nikwax Hydrophobic Down, tested to stay drier and maintain loft 60 times longer than untreated down
    • Responsible Down Standard (RDS) certified fill ensures that the waterfowl in the down supply chain are treated humanely
    • Lightweight materials and precise design allow for a tiny pack size in the supplied compression stuff sack
    • Box-wall baffled construction in key areas maximises loft and minimises cold spots, while internal mesh side walls save weight
    • Ergonomic shape and longer zipper provide a more human-friendly fit than other ultralight bags
    • Removable SynergyLink connector straps allow you to attach the bag to your sleeping mat for optimal efficiency and comfort
    • Zoned insulation maximises warmth and saves weight by intentionally placing fill where you need it most, 70% on the top and sides with 30% on the back
    • Contents Include: Compression sack and storage sack
    • EN Comfort: 5 C
    • EN Limit: 0 C
    • EN Extreme: -15 C
  • Regular Long
    Weight 0.58 kg 0.60 kg
    Length 203 cm 216 cm
    Width 72 cm 74 cm
    Height 11.43 cm 11.43 cm
    Fits 183 cm 198 cm
    Girth Shoulder 145 cm 147 cm
    Girth Hip 126 cm 130 cm
    Girth Footbox 109 cm 117 cm
    Fill Weight 0.36 kg 0.40 kg
    Packed Dimension 15 x 20 cm 15 x 20 cm
    • Fill Material: 900 Fill Goose Nikwax Hydrophobic Down RDS
    • Shell Fabric: 10D Nylon RipStop w/ DWR
    • Lining Fabric: 10D Nylon RipStop
    • Sustainability through longevity - Therm-a-Rest is committed to the highest level of materials and workmanship. They stand behind their products with a Lifetime Guarantee on all their sleeping pads, blankets and clothing
    • Ethically Sourced Materials - Therm-a-Rest actively supports industry-wide efforts to ensure all down-filled products are made with the least harm possible. They are opposed to inhumane practices and actively work with peers across all industries to improve the treatment of geese.
  • Today, Therm-a-Rest remains at the forefront of comfort innovation and quality, with a commitment to building what they make, with their own hands, whenever possible. This blend of science and a desire to make the most of every day outdoors created the world's first self-inflating air mattress, and it continues to be the fuel that drives Therm-a-Rest today

    Therm-a-Rest are a focused and passionate with an insatiable desire to be out exploring the world. They share your understanding that being outdoors is a more than a way to define your location – it's an essential part of life. Whether it's your path to personal enlightenment and inner peace, or the place you go for the adrenaline fix of the next big adventure, it's where you'd be now if you could, and that's what bonds us all.

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