Therm-a-Rest Hyperion 20 vs Zenbivy Ultralight Bed

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	Zenbivy Ultralight Bed
Weight	567 g · 0.567 kg · 1.25 lb	567 g · 0.567 kg · 1.25 lb
Brand	Therm-a-Rest	Zenbivy
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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Zenbivy Ultralight Bed

567 g

Hybrid sleep system: a 482g down quilt plus an 85g fitted sheet that attaches to a sleeping pad for a traditional, draft-free bed-like sleeping experience.

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Therm-a-Rest Hyperion 20 vs Zenbivy Ultralight Bed: 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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