Two sleeping bags worth lining up side by side. They score within a hair of each other, so it comes down to the details below.
| Mountain Hardwear Lamina 15F | NEMO Soul 15/25 | |
|---|---|---|
| GearScore | 80✓ | 80 |
| Comfort rating | 25 °F✓ | 27 °F |
| Weight | 3 lb 1.1 oz | 2 lb 14.0 oz✓ |
| Warmth-to-weight | 3.2 /100g | 3.3 /100g✓ |
| Packed size | 8.8 L✓ | 11.2 L |
| Fill power | n/s | n/s |
| Price | n/s | $320 |
| Fill | Synthetic | Synthetic |
| Style | Bag | Bag |
| Shape | Mummy | Mummy |
Highlighted cells mark the better spec: Lamina 15F in blue, Soul 15/25 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 Lamina 15F and NEMO Soul 15/25 take different routes to the same job. They are close enough that this really is about which handful of specs you weight most.
The Lamina 15F is warmer (rated 25°F vs 27°F) and more packable (8.8 L vs 11.2 L). The Soul 15/25 is 3 oz lighter and stronger on warmth-to-weight. Their GearScores land within a couple of points (80 vs 80), so neither runs away with it.
Pick the Lamina 15F if you care most about warmth and packability, which makes it the better call for colder nights and shoulder-season trips. Pick the Soul 15/25 if low weight and warmth-to-weight matter more to you, or you are focused on counting grams on long miles.
The Mountain Hardwear Lamina 15F. It is warmer (rated 25°F vs 27°F) than the Soul 15/25.
The NEMO Soul 15/25. It is 3 oz lighter than the Lamina 15F.
They are nearly tied at 80 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 Lamina 15F for warmth, or the Soul 15/25 for low weight. The spec table above shows exactly where each wins.