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Feathered Friends Swallow YF 20°F vs REI Co-op Magma 15

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

Feathered Friends Swallow YF 20°F is the lighter option — 141 g lighter than the REI Co-op Magma 15 (17% less weight). If grams matter to you, that is the one to beat.
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Spec Feathered Friends Swallow YF 20°F REI Co-op Magma 15
Weight 709 g · 0.709 kg · 1.56 lb 850 g · 0.850 kg · 1.87 lb
Brand Feathered Friends REI Co-op
Category Sleep System Sleep System
Feathered Friends Swallow YF 20°F
709 g

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

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REI Co-op Magma 15
850 g

850-fill down sleeping bag rated to 15°F. Great value.

Full details →

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Feathered Friends Swallow YF 20°F vs REI Co-op Magma 15: which should you buy?

If saving weight is your priority, the Feathered Friends Swallow YF 20°F wins — at 709 g it is 141 g (17%) lighter than the REI Co-op Magma 15 (850 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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