Therm-a-Rest Vesper Quilt 32F vs Western Mountaineering AlpinLite 20
Weight and specs compared for 2026 — and which one to choose.
Lightest quilt using 900-fill hydrophobic goose down with 360g fill weight. Features snap-button closure and pad attachment loops. Rated to 32°F / 0°C.
Check price Full details →Roomy 20F mummy bag with 850+ goose down and continuous baffles, balancing warmth, comfort and low weight.
Check price Full details →Therm-a-Rest Vesper Quilt 32F vs Western Mountaineering AlpinLite 20: which should you buy?
If saving weight is your priority, the Therm-a-Rest Vesper Quilt 32F wins — at 550 g it is 329 g (37%) lighter than the Western Mountaineering AlpinLite 20 (879 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.