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Feathered Friends Hummingbird UL 30 Sleeping Bag vs Rab Mythic Ultra 20

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

Rab Mythic Ultra 20 is the lighter option — 128 g lighter than the Feathered Friends Hummingbird UL 30 Sleeping Bag (23% less weight). If grams matter to you, that is the one to beat.
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Spec Feathered Friends Hummingbird UL 30 Sleeping Bag Rab Mythic Ultra 20
Weight 568 g · 0.568 kg · 1.25 lb 440 g · 0.440 kg · 0.97 lb
Brand Feathered Friends Rab
Category Sleep System Sleep System
Feathered Friends Hummingbird UL 30 Sleeping Bag
568 g

Premium 30°F sleeping bag loaded with 900-fill goose down, ultralight mummy construction ideal for three-season alpine and trail use.

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Rab Mythic Ultra 20
440 g

20-degree sleeping bag weighing 440g. Features TILT lining technology that reflects heat back to achieve superior warmth-to-weight ratio.

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Feathered Friends Hummingbird UL 30 Sleeping Bag vs Rab Mythic Ultra 20: which should you buy?

If saving weight is your priority, the Rab Mythic Ultra 20 wins — at 440 g it is 128 g (23%) lighter than the Feathered Friends Hummingbird UL 30 Sleeping Bag (568 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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