Therm-a-Rest Hyperion 32F/0C Ultralight Down Mummy Sleeping Bag – Black Forest

Meet the Therm-a-Rest Hyperion 32F/0C Ultralight Down Mummy Sleeping Bag in Black Forest—built for three-season backpacking where every ounce counts. This bag blends warmth, compactness, and durability for hikers who value a light pack without sacrificing rest. It pairs a featherweight silhouette with a thoughtful blend of materials to deliver dependable warmth on cool nights and damp trails.

At its core, the Hyperion uses a thermally efficient layout that concentrates insulation where you’ll feel it most. About 70% of the fill lives on the top and sides, with 30% placed along the back. This intentional zoning aims to minimize bulk while preserving warmth, so you stay comfortable as the temperatures dip and your pace slows into the evening.

Premium materials boost performance in real-world conditions. The bag features 900-fill Nikwax Hydrophobic Down, which resists moisture and keeps loft longer than untreated down. A box-baffle design helps maintain even loft and reduces cold spots, while the ThermaCapture Lining adds a soft, radiant warmth that remains light and non-bulky. Together, these elements support a compact, efficient sleep system for three-season adventures.

Designed for comfort, fit, and practical versatility

The Hyperion’s ergonomic mummy shape and longer zipper provide a comfortable entry and exit, plus easy micro-adjustment to a snug personal draft. It ships in three sizes—Small, Regular, and Long—with weights of 15, 16, and 18 ounces respectively, and packs down to a compact 5.5 x 6 inches. Small suits heights up to 5'6"; Regular fits up to 6'; Long accommodates up to 6'6". When paired with a compatible pad via SynergyLink Connectors, you can achieve integrated warmth and stability for a restful night under the stars.

The Hyperion is responsibly sourced and certified under the Responsible Down Standard, reflecting a commitment to humane practices in the down supply chain. Each package includes a storage sack and a compression stuff sack, and Therm-a-Rest backs the product with a limited lifetime warranty—helpful assurances for serious outdoor use.

Key benefits at a glance

• Ultralight, packable 32-degree mummy bag designed for three-season camping and backpacking
• Feather-light design with a compact packed size ideal for minimalist backpacks
• 900-fill Nikwax Hydrophobic Down stays drier and lofts longer in variable conditions
• Box baffling maintains loft and minimizes cold spots for consistent warmth
• ThermaCapture Lining adds cozy warmth without adding bulk
• Zoned insulation places more fill where warmth is most needed
• Ergonomic fit with a longer zipper for comfortable entry and ventilation
• SynergyLink Connectors integrate with a sleeping pad for efficiency and comfort
• Available in Small, Regular, and Long; sizes and weights tuned for diverse builders
• Responsible Down Standard certified and backed by a limited lifetime warranty

What’s included

• Storage sack
• Compression stuff sack
• Limited lifetime warranty