Outdoor Vitals StormLoft Down TopQuilt 15F vs Western Mountaineering Ultralite 20°F

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

Western Mountaineering Ultralite 20°F is the lighter option — 15 g lighter than the Outdoor Vitals StormLoft Down TopQuilt 15F (2% less weight). If grams matter to you, that is the one to beat.

Spec	Outdoor Vitals StormLoft Down TopQuilt 15F	Western Mountaineering Ultralite 20°F
Weight	695 g · 0.695 kg · 1.53 lb	680 g · 0.680 kg · 1.50 lb
Brand	Outdoor Vitals	Western Mountaineering
Category	Sleep System	Sleep System

Outdoor Vitals StormLoft Down TopQuilt 15F

695 g

15°F rated down quilt with integrated pad attachment straps and draft collar. Regular size for backpackers up to 6 ft.

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Western Mountaineering Ultralite 20°F

680 g

Premium 850-fill down sleeping bag rated to 20°F (-7°C).

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Outdoor Vitals StormLoft Down TopQuilt 15F vs Western Mountaineering Ultralite 20°F: which should you buy?

If saving weight is your priority, the Western Mountaineering Ultralite 20°F wins — at 680 g it is 15 g (2%) lighter than the Outdoor Vitals StormLoft Down TopQuilt 15F (695 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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