Therm-a-Rest Vesper 900 vs Zpacks Zip Around Quilt 900
Weight and specs compared for 2026 — and which one to choose.
Ultralight sleeping bag with 900 fill-power hydrophobic goose down. 360g of down fill. Excellent warmth-to-weight ratio for three-season backpacking trips.
Full details →Premium 900-fill down quilt with full zip for sleeping bag versatility. Draft collar and pad attachment straps for secure, warm nights below freezing.
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Therm-a-Rest Vesper 900 vs Zpacks Zip Around Quilt 900: which should you buy?
If saving weight is your priority, the Therm-a-Rest Vesper 900 wins — at 550 g it is 62 g (10%) lighter than the Zpacks Zip Around Quilt 900 (612 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.