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Katabatic Gear Alsek 22F Sleeping Quilt vs Therm-a-Rest Vesper Quilt

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

Therm-a-Rest Vesper Quilt is the lighter option — 80 g lighter than the Katabatic Gear Alsek 22F Sleeping Quilt (13% less weight). If grams matter to you, that is the one to beat.
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Spec Katabatic Gear Alsek 22F Sleeping Quilt Therm-a-Rest Vesper Quilt
Weight 630 g · 0.630 kg · 1.39 lb 550 g · 0.550 kg · 1.21 lb
Brand Katabatic Gear Therm-a-Rest
Category Sleep System Sleep System
Katabatic Gear Alsek 22F Sleeping Quilt
630 g

3-season ultralight quilt at 22.2oz. 900 fill ExpedDRY goose down with Pertex Quantum Ripstop shell.

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Therm-a-Rest Vesper Quilt
550 g

Premium 900-fill hydrophobic goose down quilt for 3-season backpacking. Pad attachment straps keep it secure through the night.

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Katabatic Gear Alsek 22F Sleeping Quilt vs Therm-a-Rest Vesper Quilt: which should you buy?

If saving weight is your priority, the Therm-a-Rest Vesper Quilt wins — at 550 g it is 80 g (13%) lighter than the Katabatic Gear Alsek 22F Sleeping Quilt (630 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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