Here is how these two backpacks compare on the numbers. Both are solid; the right one depends on the specs you care about most.
| ULA Circuit | Gossamer Gear Mariposa 60 | |
|---|---|---|
| GearScore | 74✓ | 68 |
| Capacity | 68 L | 60 L |
| Weight | 2 lb 7 oz | 2 lb 2 oz✓ |
| Rated load | 35 lb | 35 lb |
| Fabric denier | 400 D✓ | 100 D |
| Price | $300✓ | $315 |
| Type | Ultralight | Ultralight |
| Frame | Internal | Internal |
Highlighted cells mark the better spec: Circuit in blue, Mariposa 60 in amber. A blank spec is never counted as a win. Capacity is shown for context and is not scored, since more volume is a sizing choice rather than better. GearScore is the overall rating (0 to 100); re-weight it on the full backpack comparison. Prices are current MSRP.
The ULA Circuit against the Gossamer Gear Mariposa 60 is a study in priorities. The Circuit wins on durability and price, and the Mariposa 60 pushes back on low weight.
The Circuit is tougher fabric (400D vs 100D) and $15 cheaper. The Mariposa 60 is 4 oz lighter. On the default GearScore the Circuit leads 74 to 68.
Pick the Circuit if you care most about durability and price, which makes it the better call for rough ground and hard use. Pick the Mariposa 60 if low weight matter more to you, or you are focused on counting grams on long miles.
The Gossamer Gear Mariposa 60. It is 4 oz lighter than the Circuit.
The ULA Circuit. It is tougher fabric (400D vs 100D) than the Mariposa 60.
The ULA Circuit, 74 to 68 on the default algorithm. You can re-weight the factors to match your trip.
It depends on your priorities. Go with the Circuit for durability, or the Mariposa 60 for low weight. The spec table above shows exactly where each wins.