Nemo Tensor Ultralight vs Therm-a-Rest Hyperion 20

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

Nemo Tensor Ultralight is the lighter option — 227 g lighter than the Therm-a-Rest Hyperion 20 (40% less weight). If grams matter to you, that is the one to beat.

Spec	Nemo Tensor Ultralight	Therm-a-Rest Hyperion 20
Weight	340 g · 0.340 kg · 0.75 lb	567 g · 0.567 kg · 1.25 lb
Brand	Nemo	Therm-a-Rest
Category	Sleep System	Sleep System

Nemo Tensor Ultralight

340 g

Ultralight inflatable pad with minimal noise. R-value 3.5.

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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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Nemo Tensor Ultralight vs Therm-a-Rest Hyperion 20: which should you buy?

If saving weight is your priority, the Nemo Tensor Ultralight wins — at 340 g it is 227 g (40%) lighter than the Therm-a-Rest Hyperion 20 (567 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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