Cumulus Aerial 250 vs Therm-a-Rest Vesper 20 Quilt
Weight and specs compared for 2026 — and which one to choose.
Ultralight down sleeping bag with 900 FP goose down, single-layer design with no zipper, perfect for thru-hiking and backpacking.
Full details →Ultralight sleeping quilt with 900-fill hydrophobic goose down rated to 20F (-7C). Hood-quilt hybrid design with Pertex Quantum shell for minimal weight.
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Cumulus Aerial 250 vs Therm-a-Rest Vesper 20 Quilt: which should you buy?
If saving weight is your priority, the Cumulus Aerial 250 wins — at 385 g it is 165 g (30%) lighter than the Therm-a-Rest Vesper 20 Quilt (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.