Therm-a-Rest Vesper 900 vs Zpacks Solo Quilt 20F
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 →900-fill power down quilt with 20F (-7C) temperature rating in ultralight DCF shell. Pad attachment straps and adjustable snap footbox included.
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Therm-a-Rest Vesper 900 vs Zpacks Solo Quilt 20F: which should you buy?
If saving weight is your priority, the Zpacks Solo Quilt 20F wins — at 335 g it is 215 g (39%) lighter than the Therm-a-Rest Vesper 900 (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.