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Sea to Summit Ember Down Sleeping Bag vs Western Mountaineering AstraLite 26°F Sleeping Bag

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

Western Mountaineering AstraLite 26°F Sleeping Bag is the lighter option — 113 g lighter than the Sea to Summit Ember Down Sleeping Bag (19% less weight). If grams matter to you, that is the one to beat.
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Spec Sea to Summit Ember Down Sleeping Bag Western Mountaineering AstraLite 26°F Sleeping Bag
Weight 609 g · 0.609 kg · 1.34 lb 496 g · 0.496 kg · 1.09 lb
Brand Sea to Summit Western Mountaineering
Category Sleep System Sleep System
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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Western Mountaineering AstraLite 26°F Sleeping Bag
496 g

Premium 26°F sleeping bag with 850-fill ethically sourced goose down. Continuous-baffle construction eliminates cold spots.

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Sea to Summit Ember Down Sleeping Bag vs Western Mountaineering AstraLite 26°F Sleeping Bag: which should you buy?

If saving weight is your priority, the Western Mountaineering AstraLite 26°F Sleeping Bag wins — at 496 g it is 113 g (19%) 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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