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Nunatak Sastrugi Sleeping Bag (22°F) vs Rab Mythic Ultra (20°F)

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

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Nunatak Sastrugi Sleeping Bag (22°F) Rab Mythic Ultra (20°F)
Weight 614 g · 0.614 kg · 1.35 lb 700 g · 0.700 kg · 1.54 lb
Brand Nunatak Rab
Category Sleep System Sleep System
Nunatak Sastrugi Sleeping Bag (22°F)
614 g

Custom ultralight sleeping bag with 900-fill goose down. 614g for 22-degree regular-width medium-length configuration. Made to order with customization options

See it in your base weight → Full details →
Rab Mythic Ultra (20°F)
700 g

Winter-capable sleeping bag at 24.7 oz (700g) with 900-fill hydrophobic down, ideal for 3-season to winter transition camping.

See it in your base weight → Full details →

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Nunatak Sastrugi Sleeping Bag (22°F) vs Rab Mythic Ultra (20°F): which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

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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