Thermarest Hyperion 20 UL

The Thermarest Hyperion 20 UL is an ultra lightweight down sleeping bag that offers high performance features. Ideal for fast and light adventures. 

Featherlight whilst providing high-performance warmth, the Thermarest 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 Therm-a-Rest performance features, the Hyperion keeps your pack featherweight without sacrificing an ounce of performance. Compression sack and storage sack included.

More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags.

Features

• Ultralight: One of the lightest pieces in its class, the Hyperion 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.
• Unrivalled 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.

Specification 

	Small	Regular	Long
Colour	Deep Pacific	Deep Pacific	Deep Pacific
Weight (Standard)	1 lbs 3 oz	1 lbs 4 oz	1 lbs 6 oz
Weight (Metric)	0.55 kg	0.58 kg	0.63 kg
Width (Standard)	27.5 in	28.5 in	29 in
Width (Metric)	70 cm	72 cm	74 cm
Length (Standard)	73 in	80 in	85 in
Length (Metric)	185 cm	203 cm	216 cm
Height (Standard)	4.5 in	4.5 in	4.5 in
Fits (Standard)	66 in	72 in	78 in
Fits (Metric)	168 cm	183 cm	198 cm
Girth, Shoulder (Standard)	55 in	57 in	58 in
Girth, Shoulder (Metric)	140 cm	145 cm	147 cm
Girth, Hip (Standard)	48.5 in	49.5 in	51 in
Girth, Hip (Metric)	123 cm	126 cm	130 cm
Girth, Foot box (Standard)	40 in	43 in	46 in
Girth, Foot box (Metric)	102 cm	109 cm	117 cm
Packed dimension (Standard)	6 x 8 in	6 x 8 in	6 x 8 in
Packed dimension (Metric)	15 x 20 cm	15 x 20 cm	15 x 20 cm
EN Comfort (C)	0 C	0 C	0 C
EN Comfort (F)	32 F	32 F	32 F
EN Limit (C)	-6 C	-6 C	-6 C
EN Limit (F)	20 F	20 F	20 F
EN Extreme (F)	-9 F	-9 F	-9 F
EN Extreme (C)	-23 C	-23 C	-23 C
Fill material	900 Fill Goose Nikwax Hydrophobic Down RDS	900 Fill Goose Nikwax Hydrophobic Down RDS	900 Fill Goose Nikwax Hydrophobic Down RDS
Fill weight (Standard)	11.5 oz	12.5 oz	14 oz
Fill weight (Metric)	0.33 kg	0.36 kg	0.40 kg
Shell fabric	10D Nylon RipStop w/ DWR	10D Nylon RipStop w/ DWR	10D Nylon RipStop w/ DWR
Lining fabric	10D Nylon RipStop	10D Nylon RipStop	10D Nylon RipStop
Zipper side	Left	Left	Left