Cumulus Aerial 250 vs Nunatak Sastrugi Sleeping Bag (22°F)
Weight and specs compared for 2026 — and which one to choose.
Ultralight down sleeping bag with 900 FP goose down, single-layer design with no zipper, perfect for thru-hiking and backpacking.
Full details →Custom ultralight sleeping bag with 900-fill goose down. 614g for 22-degree regular-width medium-length configuration. Made to order with customization options
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Cumulus Aerial 250 vs Nunatak Sastrugi Sleeping Bag (22°F): which should you buy?
If saving weight is your priority, the Cumulus Aerial 250 wins — at 385 g it is 229 g (37%) 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.