Katabatic Gear Alsek 22°F vs Sea to Summit Ether Light XT

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

Sea to Summit Ether Light XT is the lighter option — 19 g lighter than the Katabatic Gear Alsek 22°F (4% less weight). If grams matter to you, that is the one to beat.

Spec	Katabatic Gear Alsek 22°F	Sea to Summit Ether Light XT
Weight	454 g · 0.454 kg · 1.00 lb	435 g · 0.435 kg · 0.96 lb
Brand	Katabatic Gear	Sea to Summit
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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Sea to Summit Ether Light XT

435 g

Ultralight air sleeping pad with 3D construction for comfort.

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Katabatic Gear Alsek 22°F vs Sea to Summit Ether Light XT: which should you buy?

If saving weight is your priority, the Sea to Summit Ether Light XT wins — at 435 g it is 19 g (4%) 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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