Feathered Friends Hummingbird UL 30 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 — 23 g lighter than the Feathered Friends Hummingbird UL 30 (4% less weight). If grams matter to you, that is the one to beat.

Spec	Feathered Friends Hummingbird UL 30	Feathered Friends Hummingbird YF 30°F
Weight	533 g · 0.533 kg · 1.18 lb	510 g · 0.510 kg · 1.12 lb
Brand	Feathered Friends	Feathered Friends
Category	Sleep System	Sleep System

Feathered Friends Hummingbird UL 30

533 g

Premium 30°F ultralight sleeping bag with 900-fill-power goose down. Compact, warm, and durable for multi-season backpacking. (Regular size)

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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 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 23 g (4%) lighter than the Feathered Friends Hummingbird UL 30 (533 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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