Here is how these two sleeping bags compare on the numbers. They score within a hair of each other, so it comes down to the details below.
| Big Agnes Rabbit Ears 25 | Mountain Hardwear Lamina 30F | |
|---|---|---|
| GearScore | 81✓ | 80 |
| Comfort rating | 34 °F✓ | 37 °F |
| Weight | 2 lb 1.0 oz✓ | 2 lb 2.9 oz |
| Warmth-to-weight | 3.8 /100g✓ | 3.3 /100g |
| Packed size | 9.4 L | 8.1 L✓ |
| Fill power | 600 FP | n/s |
| Price | $200✓ | $240 |
| Fill | Down | Synthetic |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Rabbit Ears 25 in blue, Lamina 30F 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 Big Agnes Rabbit Ears 25 against the Mountain Hardwear Lamina 30F is a study in priorities. They are close enough that this really is about which handful of specs you weight most.
The Rabbit Ears 25 is warmer (rated 34°F vs 37°F), 2 oz lighter, and stronger on warmth-to-weight. The Lamina 30F is more packable (8.1 L vs 9.4 L). Their GearScores land within a couple of points (81 vs 80), so neither runs away with it.
Pick the Rabbit Ears 25 if you care most about warmth and low weight, which makes it the better call for colder nights and shoulder-season trips. Pick the Lamina 30F if packability matter more to you, or you are focused on saving space in your pack.
The Big Agnes Rabbit Ears 25. It is warmer (rated 34°F vs 37°F) than the Lamina 30F.
The Big Agnes Rabbit Ears 25. It is 2 oz lighter than the Lamina 30F.
They are nearly tied at 81 and 80 on the default algorithm, so re-weight the score to your own priorities to break the tie.
It depends on your priorities. Go with the Rabbit Ears 25 for warmth, or the Lamina 30F for packability. The spec table above shows exactly where each wins.