Mountain Equipment Company

Therm-a-Rest Hyperion -6C Down Sleeping Bag - Unisex


Colour: Deep Pacific

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Rocksolid guarantee

Shop with confidence. If it’s not working out, you can return it (consumables, electronics, undergarments and swimwear excluded).
Really. If it's not up to snuff after you use it (a couple times) you can still bring it back. It lasts longer than 30 days, but not forever. We'll be fair about it.


Ridiculously lightweight warmth. The Hyperion -6C packs down to the size of a loaf of bread, weighs the same as a big can of soup and keeps you warm when the temp dips below freezing. The secret sauce is the premium 900-fill-power down insulation that has great compressibility and provides exceptional warmth at a light weight, combined with mesh box baffled construction that maximizes loft and minimizes cold spots.

  • Gossamer-thin 10-denier ripstop nylon shell and lining save weight and bulk. DWR-treated shell repels water moisture and condensation
  • Down has a Nikwax hydrophobic treatment to dry faster, maintain loft better and retain less moisture than traditional down
  • Down is certified to the Responsible Down Standard for animal welfare
  • Zoned insulation provides insulation where it's needed – on top. Because sleeping pads provide additional insulation, there is less on the bottom of this bag
  • Reflective ThermaCapture™ lining seals in heat to provide additional warmth without adding grams
  • 2 Removable SynergyLink™ connectors hold your mattress in place under the bag for better thermal efficiency and comfort
  • Snag-free zipper with full-length draft tube keeps cold air from sneaking in
  • Ergonomic shape provides a less restrictive fit than other ultralight bags
  • Includes both a stuff sack and a storage sack

Tech specs

Weight540g (Small)
570g (Regular)
620g (Long)
Ideal for
  • Backpacking
ShapeMummy (Small)
Mummy (Regular)
Mummy (Long)
  • 900 fill-power water-repellent goose down
330g (Small)
360g (Regular)
400g (Long)
  • Nikwax Hydrophobic Down
  • ThermaCapture
  • Baffle
Face fabric
  • 10-denier nylon
  • 10-denier nylon
Recommended Compression Sack8L
Packed size15x20 cmcm
Shoulder girth140cm (Small)
145cm (Regular)
147cm (Long)
Hip girth126cm (Small)
126cm (Regular)
130cm (Long)
Foot girth102cm (Small)
109cm (Regular)
117cm (Long)
Additional feature(s)
  • Draft tube behind zipper
  • DWR-treated shell fabric
  • Home storage sack included
  • Sleeping pad sleeve or straps
  • Stuff sack included
  • Ultralight
  • Small fits to 5' 6" (168 cm)
  • Regular fits to 6' 0" (183 cm)
  • Long fits to 6' 6" (198 cm)
Product sustainability
  • Certified Responsible Down
Made inChina

Reviews (27)

4 out of 5 stars with 27 reviews for Therm-a-Rest Hyperion -6C Down Sleeping Bag - Unisex

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