Here is how these two sleeping bags compare on the numbers. On the data the Hummingbird UL 20 is the stronger all-round pick, and the question is whether the UltraLite still fits your budget or priorities.
| Feathered Friends Hummingbird UL 20 | Western Mountaineering UltraLite | |
|---|---|---|
| GearScore | 87✓ | 66 |
| Comfort rating | 30 °F | 30 °F |
| Weight | 23.9 oz✓ | 29.0 oz |
| Warmth-to-weight | 5.9 /100g✓ | 4.9 /100g |
| Packed size | 9.0 L | n/s |
| Fill power | 950 FP✓ | 850 FP |
| Price | $639 | $630✓ |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Hummingbird UL 20 in blue, UltraLite in amber. A blank spec is never counted as a win. A lower comfort rating in °F means a warmer bag, so the warmer bag takes that row. GearScore is the overall rating (0 to 100); re-weight it on the full bag comparison. Prices are current MSRP.
The Feathered Friends Hummingbird UL 20 against the Western Mountaineering UltraLite is a study in priorities. The Hummingbird UL 20 is the stronger pick on most of the specs that matter, while the UltraLite makes its case on price.
The Hummingbird UL 20 is 5 oz lighter, stronger on warmth-to-weight, and higher fill power (950 vs 850). The UltraLite is $9 cheaper. On the default GearScore the Hummingbird UL 20 leads 87 to 66.
Pick the Hummingbird UL 20 if you care most about low weight and warmth-to-weight, which makes it the better call for counting grams on long miles. Pick the UltraLite if price matter more to you, or you are focused on getting the most for your money.
The Feathered Friends Hummingbird UL 20. It is 5 oz lighter than the UltraLite.
The Feathered Friends Hummingbird UL 20. It is stronger on warmth-to-weight than the UltraLite.
The Feathered Friends Hummingbird UL 20, 87 to 66 on the default algorithm. You can re-weight the factors to match your trip.
The Hummingbird UL 20 is the stronger all-round pick here. Choose the UltraLite if price is your priority.