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Feathered Friends Swallow YF 20°F vs Marmot Plasma 15°F

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Feathered Friends Swallow YF 20°F Marmot Plasma 15°F
Weight 828 g · 0.828 kg · 1.83 lb
size Regular, average weight 20°F
 850 g · 0.850 kg · 1.87 lb
Brand Feathered Friends Marmot
Category Sleep System Sleep System
Feathered Friends Swallow YF 20°F
828 g

Premium 950-fill down sleeping bag rated to 20°F.

See it in your base weight → Full details →
Marmot Plasma 15°F
850 g

800-fill down sleeping bag rated to 15°F (-9°C).

See it in your base weight → Full details →

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Feathered Friends Swallow YF 20°F vs Marmot Plasma 15°F: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

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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