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NEMO Tensor Extreme Conditions vs Zpacks Classic Sleeping Bag 20F

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

Zpacks Classic Sleeping Bag 20F is the lighter option — 135 g lighter than the NEMO Tensor Extreme Conditions (28% less weight). If grams matter to you, that is the one to beat.
Spec NEMO Tensor Extreme Conditions Zpacks Classic Sleeping Bag 20F
Weight 482 g · 0.482 kg · 1.06 lb 347 g · 0.347 kg · 0.77 lb
Brand NEMO Zpacks
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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Zpacks Classic Sleeping Bag 20F
347 g

Mummy-style sleeping bag rated to 20F (-7C) with 900-fill goose down. DCF outer shell for low weight and packability. Water-resistant treatment included.

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NEMO Tensor Extreme Conditions vs Zpacks Classic Sleeping Bag 20F: which should you buy?

If saving weight is your priority, the Zpacks Classic Sleeping Bag 20F wins — at 347 g it is 135 g (28%) lighter than the NEMO Tensor Extreme Conditions (482 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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