Nemo Disco 15°F vs REI Co-op Magma 15

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

REI Co-op Magma 15 is the lighter option — 340 g lighter than the Nemo Disco 15°F (29% less weight). If grams matter to you, that is the one to beat.

Spec	Nemo Disco 15°F	REI Co-op Magma 15
Weight	1,190 g · 1.190 kg · 2.62 lb	850 g · 0.850 kg · 1.87 lb
Brand	Nemo	REI Co-op
Category	Sleep System	Sleep System

Nemo Disco 15°F

1,190 g

Spoon-shaped sleeping bag for side sleepers. 650-fill down.

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REI Co-op Magma 15

850 g

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

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Nemo Disco 15°F vs REI Co-op Magma 15: which should you buy?

If saving weight is your priority, the REI Co-op Magma 15 wins — at 850 g it is 340 g (29%) lighter than the Nemo Disco 15°F (1,190 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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