Nunatak Sastrugi Sleeping Bag (22°F) vs Sea to Summit Ember XT 0°C Sleeping Bag
Weight and specs compared for 2026 — and which one to choose.
Custom ultralight sleeping bag with 900-fill goose down. 614g for 22-degree regular-width medium-length configuration. Made to order with customization options
Full details →Ultralight 0°C rated bag with 850+ UltraDry Down insulation. Stretch-knit lining and sculpted hood for packability and comfort.
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Nunatak Sastrugi Sleeping Bag (22°F) vs Sea to Summit Ember XT 0°C Sleeping Bag: which should you buy?
If saving weight is your priority, the Sea to Summit Ember XT 0°C Sleeping Bag wins — at 609 g it is 5 g (1%) lighter than the Nunatak Sastrugi Sleeping Bag (22°F) (614 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.