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Katabatic Gear Alsek 22°F vs Nemo Tensor Ultralight

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

Nemo Tensor Ultralight is the lighter option — 114 g lighter than the Katabatic Gear Alsek 22°F (25% less weight). If grams matter to you, that is the one to beat.
Spec Katabatic Gear Alsek 22°F Nemo Tensor Ultralight
Weight 454 g · 0.454 kg · 1.00 lb 340 g · 0.340 kg · 0.75 lb
Brand Katabatic Gear Nemo
Category Sleep System Sleep System
Katabatic Gear Alsek 22°F
454 g

Premium 850-fill down sleeping quilt rated to 22°F.

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Nemo Tensor Ultralight
340 g

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

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Katabatic Gear Alsek 22°F vs Nemo Tensor Ultralight: which should you buy?

If saving weight is your priority, the Nemo Tensor Ultralight wins — at 340 g it is 114 g (25%) lighter than the Katabatic Gear Alsek 22°F (454 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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