Therm-a-Rest Hyperion 20 vs Therm-a-Rest Hyperion 20F/-6C (Regular)

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

Both weigh the same at 567 g, so choose on features, price and fit.

Spec	Therm-a-Rest Hyperion 20	Therm-a-Rest Hyperion 20F/-6C (Regular)
Weight	567 g · 0.567 kg · 1.25 lb	567 g · 0.567 kg · 1.25 lb
Brand	Therm-a-Rest	Therm-a-Rest
Category	Sleep System	Sleep System

Therm-a-Rest Hyperion 20

567 g

900-fill Hyperdry down mummy sleeping bag rated to 20F/-6C. 10D ripstop nylon shell with DWR treatment. Regular size.

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

On weight these two are identical (567 g), so your decision comes down to features, fit and price. Check the full details and current price for each above.

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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