Feathered Friends Hummingbird UL 30 Sleeping Bag vs Rab Mythic Ultra (20°F)
Weight and specs compared for 2026 — and which one to choose.
Premium 30°F sleeping bag loaded with 900-fill goose down, ultralight mummy construction ideal for three-season alpine and trail use.
Full details →Winter-capable sleeping bag at 24.7 oz (700g) with 900-fill hydrophobic down, ideal for 3-season to winter transition camping.
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Feathered Friends Hummingbird UL 30 Sleeping Bag vs Rab Mythic Ultra (20°F): which should you buy?
If saving weight is your priority, the Feathered Friends Hummingbird UL 30 Sleeping Bag wins — at 568 g it is 132 g (19%) lighter than the Rab Mythic Ultra (20°F) (700 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.