Therm-A-Rest Hyperion 20 UL Down Sleeping Bag
FEATHERLIGHT PACK WEIGHT AND HIGH PERFORMANCE SLEEPING BAG
Weighing only 550g, challenge the cold and rest easy while moving through the mountains with the Therm-A-Rest Hyperion 20 UL Sleeping Bag. Built to provide a featherlight pack weight and high-performance warmth, the Therm-A-Rest Hyperion 20 UL Sleeping Bag 20F/-6C is among the lightest in its class without sacrificing an ounce of performance. The Therm-A-Rest Hyperion 20 UL Sleeping Bag uses thermally-efficient box baffled construction in key areas to ensure warmth and comfort in an ultralight package. Designed with high-quality materials and high performance features, the Hyperion keeps your pack light, giving you the freedom to move quickly in the backcountry. Storage sack and compression stuff sack included
FEATURES OF THE HYPERION 20 UL DOWN SLEEPING BAG
-
Ultralight:
One of the lightest pieces in its class, the Therm-A-Rest Hyperion 20 UL Sleeping Bag sets a new standard for high-performance outdoor equipment.
-
900-fill
Nikwax Hydrophobic Down™ : Stays drier and maintains loft 60 times longer than untreated down.
-
Unrivaled Packability:
Lightweight materials and precise design allow for a smaller packed size than ever before.
-
Box Baffled Construction:
Uses mesh walls to maximise loft and minimise cold spots in key areas.
-
Comfort Fit:
Ergonomic shape and longer zipper provide a more human-friendly fit than other ultralight bags.
-
SynergyLink™ Connectors:
Integrate the bag with a mattress for optimal efficiency and comfort; removable for versatility.
-
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.
-
Responsible Down Standard Certified:
Certification that ensures that the waterfowl in the down supply chain are treated humanely.
-
Specifications
Small:
Weight - 550g
Width - 70cm
Length - 185cm
Fits - 168cm
Girth, Shoulder - 140cm
Girth, Hip - 123cm
Girth, Foot Box - 102cm
Packed Dimensions - 15cm x 20cm
EN Comfort - 0 C
EN Limit - -6 C
EN Extreme - -23 C
Fill - 900 Fill Goose Nikwax Hydrophobic Down RDS
Shell Fabric - 10D Nylon RipStop with DWR
Zip side - Left
Regular:
Weight - 580g
Width - 72cm
Length - 203cm
Fits - 183cm
Girth, Shoulder - 145cm
Girth, Hip - 126cm
Girth, Foot Box - 109cm
Packed Dimensions - 15cm x 20cm
EN Comfort - 0 C
EN Limit - -6 C
EN Extreme - -23 C
Fill - 900 Fill Goose Nikwax Hydrophobic Down RDS
Shell Fabric - 10D Nylon RipStop with DWR
Zip side - Left -
What We think
The Therm-a-rest Hyperion 20F/-6C is a super lightweight sleeping bag with a -6°C EN Rating, yet it only weighs 570 grams! It is among the lightest in its class without sacrificing high-performance warmth.
- Mark Hayhurst, V+P Field Tester -
Weight
550 g
-
Fill Power
900
-
Season Rating
3-Season
-
Comfort Limit
-6°C
New content loaded

"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