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Feathered Friends Hummingbird UL 30 Sleeping Bag vs Feathered Friends Hummingbird YF 30°F

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

Feathered Friends Hummingbird YF 30°F is the lighter option — 58 g lighter than the Feathered Friends Hummingbird UL 30 Sleeping Bag (10% 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 Feathered Friends Hummingbird YF 30°F
Weight 568 g · 0.568 kg · 1.25 lb 510 g · 0.510 kg · 1.12 lb
Brand Feathered Friends Feathered Friends
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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Feathered Friends Hummingbird YF 30°F
510 g

Ultralight 950-fill down bag rated to 30°F (-1°C).

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Feathered Friends Hummingbird UL 30 Sleeping Bag vs Feathered Friends Hummingbird YF 30°F: which should you buy?

If saving weight is your priority, the Feathered Friends Hummingbird YF 30°F wins — at 510 g it is 58 g (10%) 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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