Two sleeping bags worth lining up side by side. The Phantom 30F leans on warmth while the Hummingbird UL 30 answers with low weight, so the pick comes down to which you value.
| Mountain Hardwear Phantom 30F | Feathered Friends Hummingbird UL 30 | |
|---|---|---|
| GearScore | 84✓ | 61 |
| Comfort rating | 39 °F✓ | 40 °F |
| Weight | 22.1 oz | 21.2 oz✓ |
| Warmth-to-weight | 4.9 /100g | 5.0 /100g✓ |
| Packed size | 4.0 L | n/s |
| Fill power | 800 FP | 950 FP✓ |
| Price | $580 | $579✓ |
| Fill | Down | Down |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Phantom 30F in blue, Hummingbird UL 30 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 Mountain Hardwear Phantom 30F and Feathered Friends Hummingbird UL 30 take different routes to the same job. The Phantom 30F wins on warmth, and the Hummingbird UL 30 pushes back on low weight and warmth-to-weight.
The Phantom 30F is warmer (rated 39°F vs 40°F). The Hummingbird UL 30 is 1 oz lighter, stronger on warmth-to-weight, and higher fill power (950 vs 800). On the default GearScore the Phantom 30F leads 84 to 61.
Pick the Phantom 30F if you care most about warmth, which makes it the better call for colder nights and shoulder-season trips. Pick the Hummingbird UL 30 if low weight and warmth-to-weight matter more to you, or you are focused on counting grams on long miles.
The Mountain Hardwear Phantom 30F. It is warmer (rated 39°F vs 40°F) than the Hummingbird UL 30.
The Feathered Friends Hummingbird UL 30. It is 1 oz lighter than the Phantom 30F.
The Mountain Hardwear Phantom 30F, 84 to 61 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Phantom 30F for warmth, or the Hummingbird UL 30 for low weight. The spec table above shows exactly where each wins.