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Sierra Designs Nitro Quilt 20 vs Western Mountaineering Ultralite 20F Sleeping Bag

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

Sierra Designs Nitro Quilt 20 is the lighter option — 114 g lighter than the Western Mountaineering Ultralite 20F Sleeping Bag (14% less weight). If grams matter to you, that is the one to beat.
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Spec Sierra Designs Nitro Quilt 20 Western Mountaineering Ultralite 20F Sleeping Bag
Weight 708 g · 0.708 kg · 1.56 lb 822 g · 0.822 kg · 1.81 lb
Brand Sierra Designs Western Mountaineering
Category Sleep System Sleep System
Sierra Designs Nitro Quilt 20
708 g

Ultralight down quilt at 708g. 14.8oz of 800-fill water-resistant DriDown, 20-degree rating.

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Western Mountaineering Ultralite 20F Sleeping Bag
822 g

Hand-sewn sleeping bag, 29oz, 850+ fill power goose down, three-season

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Sierra Designs Nitro Quilt 20 vs Western Mountaineering Ultralite 20F Sleeping Bag: which should you buy?

If saving weight is your priority, the Sierra Designs Nitro Quilt 20 wins — at 708 g it is 114 g (14%) lighter than the Western Mountaineering Ultralite 20F Sleeping Bag (822 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.

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