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Therm-a-Rest Hyperion™ 20F Sleeping Bag

sku# 188540
Therm-a-Rest - Hyperion™ 20F Sleeping BagTherm-a-Rest - Hyperion™ 20F Sleeping BagTherm-a-Rest - Hyperion™ 20F Sleeping BagTherm-a-Rest - Hyperion™ 20F Sleeping BagTherm-a-Rest - Hyperion™ 20F Sleeping BagTherm-a-Rest - Hyperion™ 20F Sleeping Bag
Model Info


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Product Info

Be bold and brave the cold with the Therm-a-Rest Hyperion™ 20F Sleeping Bag. Zoned insulation provides more warmth on top where you need it and box baffled construction uses mesh walls to increase warmth and reduce cold spots. Nikwax Hydrophobic Down is water-resistant, lightweight, and ultra-packable, making the Hyperion an unbeatable bag for for adventures where weight and warmth are of the utmost importance.

Product Details


Shell10D Nylon RipStop with Durable Water Repellant treatment.

Lining10D Nylon RipStop.


900 Fill Goose Nikwax Hydrophobic Down RDS


Small - 73" x 27.5"

Regular - 80" x 28.5"

Long - 85" x 29"

Packed - 6" x 8"


Nikwax Hydrophobic Down™Stays drier and maintains loft 60 times longer than untreated down.

Box Baffled ConstructionUses mesh walls to maximize loft and minimize cold spots.

SynergyLink™ ConnectorsIntegrate the bag with a pad for optimal comfort and thermal efficiency; removable for versatility.

Zoned InsulationMaximizes warmth and saves weight by intentionally placing fill where you need it most. Placing 65% of the fill on top and 35% on the bottom keeps the sleeping bag lightweight without sacrificing warmth.

Responsible Down Standard CertifiedCertification that ensures that the waterfowl in the down supply chain are treated humanely.


  • Insulation: Down
  • Temperature Rating: 20
  • Shape: Mummy
  • Stuff Sack Size: 6 x 8
  • Warranty: Limited Lifetime
Size Long Regular Small
Length Long Regular Short
Zipper Location Left Side Left Side Left Side
Weight (g) 630 580 550

Other Notes

Therm-a-Rest products can only be shipped within the United States



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