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Therm-a-Rest Vesper Quilt 45°F vs Zenbivy Ultralight Bed Quilt 25°F

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

Zenbivy Ultralight Bed Quilt 25°F is the lighter option — 68 g lighter than the Therm-a-Rest Vesper Quilt 45°F (12% less weight). If grams matter to you, that is the one to beat.
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Spec Therm-a-Rest Vesper Quilt 45°F Zenbivy Ultralight Bed Quilt 25°F
Weight 550 g · 0.550 kg · 1.21 lb 482 g · 0.482 kg · 1.06 lb
Brand Therm-a-Rest Zenbivy
Category Sleep System Sleep System
Therm-a-Rest Vesper Quilt 45°F
550 g

900-fill hydrophobic goose down quilt rated to 45°F / 7°C; ultralight and highly packable for warm-weather thru-hiking and fastpacking.

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Zenbivy Ultralight Bed Quilt 25°F
482 g

Ultralight down quilt with 850FP duck down insulation, 482g weight for regular size with Pertex shell fabric.

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Therm-a-Rest Vesper Quilt 45°F vs Zenbivy Ultralight Bed Quilt 25°F: which should you buy?

If saving weight is your priority, the Zenbivy Ultralight Bed Quilt 25°F wins — at 482 g it is 68 g (12%) lighter than the Therm-a-Rest Vesper Quilt 45°F (550 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.

More sleep system comparisons