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Nemo Tensor Ultralight vs Zpacks Classic 20°F Sleeping Bag

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

Nemo Tensor Ultralight is the lighter option — 236 g lighter than the Zpacks Classic 20°F Sleeping Bag (41% less weight). If grams matter to you, that is the one to beat.
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Spec Nemo Tensor Ultralight Zpacks Classic 20°F Sleeping Bag
Weight 340 g · 0.340 kg · 0.75 lb 576 g · 0.576 kg · 1.27 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 20°F Sleeping Bag
576 g

Ultralight mummy sleeping bag with 900-fill power goose down rated to 20°F. Water-resistant down and Dyneema shell. Weighs 20.3 oz in regular size.

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

If saving weight is your priority, the Nemo Tensor Ultralight wins — at 340 g it is 236 g (41%) lighter than the Zpacks Classic 20°F Sleeping Bag (576 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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