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Nemo Disco 15°F vs Therm-a-Rest Hyperion 20F/-6C (Regular)

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

Therm-a-Rest Hyperion 20F/-6C (Regular) is the lighter option — 623 g lighter than the Nemo Disco 15°F (52% less weight). If grams matter to you, that is the one to beat.
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Spec Nemo Disco 15°F Therm-a-Rest Hyperion 20F/-6C (Regular)
Weight 1,190 g · 1.190 kg · 2.62 lb 567 g · 0.567 kg · 1.25 lb
Brand Nemo Therm-a-Rest
Category Sleep System Sleep System
Nemo Disco 15°F
1,190 g

Spoon-shaped sleeping bag for side sleepers. 650-fill down.

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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.

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Nemo Disco 15°F vs Therm-a-Rest Hyperion 20F/-6C (Regular): which should you buy?

If saving weight is your priority, the Therm-a-Rest Hyperion 20F/-6C (Regular) wins — at 567 g it is 623 g (52%) lighter than the Nemo Disco 15°F (1,190 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

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

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