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NEMO Tensor Extreme Conditions vs Therm-a-Rest Parsec 20F

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

NEMO Tensor Extreme Conditions is the lighter option — 338 g lighter than the Therm-a-Rest Parsec 20F (41% less weight). If grams matter to you, that is the one to beat.
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Spec NEMO Tensor Extreme Conditions Therm-a-Rest Parsec 20F
Weight 482 g · 0.482 kg · 1.06 lb 820 g · 0.820 kg · 1.81 lb
Brand NEMO Therm-a-Rest
Category Sleep System Sleep System
NEMO Tensor Extreme Conditions
482 g

Four-season insulated air pad delivering an 8.5 R-value at just 17oz. Among the lightest extremely well-insulated backpacking pads. Regular mummy.

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Therm-a-Rest Parsec 20F
820 g

Updated 2026 ultralight 3-season sleeping bag with 900-fill Muscovy hydrophobic down. Comfort rating -6°C. Refined baffles for improved loft and simplified inte...

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NEMO Tensor Extreme Conditions vs Therm-a-Rest Parsec 20F: which should you buy?

If saving weight is your priority, the NEMO Tensor Extreme Conditions wins — at 482 g it is 338 g (41%) lighter than the Therm-a-Rest Parsec 20F (820 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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