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Nemo Disco 15°F vs Sea to Summit Ember Down Sleeping Bag

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

Sea to Summit Ember Down Sleeping Bag is the lighter option — 581 g lighter than the Nemo Disco 15°F (49% less weight). If grams matter to you, that is the one to beat.
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Spec Nemo Disco 15°F Sea to Summit Ember Down Sleeping Bag
Weight 1,190 g · 1.190 kg · 2.62 lb 609 g · 0.609 kg · 1.34 lb
Brand Nemo Sea to Summit
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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Sea to Summit Ember Down Sleeping Bag
609 g

850+ Ultradry down sleeping bag rated to 9°C; packs to 5.1L with soft Thermolite liner and recycled shell fabric.

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Nemo Disco 15°F vs Sea to Summit Ember Down Sleeping Bag: which should you buy?

If saving weight is your priority, the Sea to Summit Ember Down Sleeping Bag wins — at 609 g it is 581 g (49%) 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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