← All gear comparisons

Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest Vesper 32°F Sleeping Bag

Weight and specs compared for 2026 — and which one to choose.

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

Swipe to see all details.

Spec Therm-a-Rest Hyperion 20F/-6C (Regular) Therm-a-Rest Vesper 32°F Sleeping Bag
Weight 567 g · 0.567 kg · 1.25 lb 550 g · 0.550 kg · 1.21 lb
Brand Therm-a-Rest Therm-a-Rest
Category Sleep System Sleep System
Therm-a-Rest Hyperion 20F/-6C (Regular)
567 g

Ultralight 20F down mummy bag with 900-fill Nikwax Hydrophobic Down for fast-and-light backpacking.

See it in your base weight → Full details →
Therm-a-Rest Vesper 32°F Sleeping Bag
550 g

Premium ultralight sleeping bag with 900-fill hydrophobic goose down. Rated to 32°F (0°C) with mummy fit and draft collar for warmth retention.

See it in your base weight → Full details →

Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.

HikeLoad is reader-supported. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Learn more.

Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest Vesper 32°F Sleeping Bag: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

More sleep system comparisons

Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest Vesper 900 Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest Hyperion 20 Therm-a-Rest Hyperion 20F/-6C (Regular) vs Feathered Friends Hummingbird UL 30 Sleeping Bag Therm-a-Rest Hyperion 20F/-6C (Regular) vs Rab Mythic Ultra 360 (22°F) Therm-a-Rest Hyperion 20F/-6C (Regular) vs Sea to Summit Ember Sleeping Bag Therm-a-Rest Hyperion 20F/-6C (Regular) vs Therm-a-Rest Parsec 20F