Nemo Tensor Ultralight vs Zpacks Classic Sleeping Bag 20F

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

Nemo Tensor Ultralight is the lighter option — 7 g lighter than the Zpacks Classic Sleeping Bag 20F (2% less weight). If grams matter to you, that is the one to beat.

Spec	Nemo Tensor Ultralight	Zpacks Classic Sleeping Bag 20F
Weight	340 g · 0.340 kg · 0.75 lb	347 g · 0.347 kg · 0.77 lb
Brand	Nemo	Zpacks
Category	Sleep System	Sleep System

Nemo Tensor Ultralight

340 g

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

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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 Ultralight vs Zpacks Classic Sleeping Bag 20F: which should you buy?

If saving weight is your priority, the Nemo Tensor Ultralight wins — at 340 g it is 7 g (2%) lighter than the Zpacks Classic Sleeping Bag 20F (347 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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