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Cumulus Aerial 250 Quilt vs Sea to Summit Ember Down Sleeping Bag

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

Cumulus Aerial 250 Quilt is the lighter option — 119 g lighter than the Sea to Summit Ember Down Sleeping Bag (20% less weight). If grams matter to you, that is the one to beat.
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Spec Cumulus Aerial 250 Quilt Sea to Summit Ember Down Sleeping Bag
Weight 490 g · 0.490 kg · 1.08 lb 609 g · 0.609 kg · 1.34 lb
Brand Cumulus Sea to Summit
Category Sleep System Sleep System
Cumulus Aerial 250 Quilt
490 g

Summer 3-season ultralight quilt with 250g of 850 fill power down insulation, minimalist sleep system

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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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Cumulus Aerial 250 Quilt vs Sea to Summit Ember Down Sleeping Bag: which should you buy?

If saving weight is your priority, the Cumulus Aerial 250 Quilt wins — at 490 g it is 119 g (20%) lighter than the Sea to Summit Ember Down Sleeping Bag (609 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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