A close look at two tents buyers cross-shop. They score within a hair of each other, so it comes down to the details below.
| NEMO Dragonfly OSMO 3P | SlingFin Portal 3 | |
|---|---|---|
| GearScore | 77✓ | 76 |
| Capacity | 3 | 3 |
| Packed weight | 54.0 oz✓ | 60.0 oz |
| Floor area | 41.2 sq ft | 41.5 sq ft✓ |
| Space-to-weight | 12.2 /lb✓ | 11.1 /lb |
| Peak height | 42 in | 44 in✓ |
| Doors | 2 | 2 |
| Vestibules | 2 | 2 |
| Price | $620✓ | $690 |
| Type | Ultralight | Ultralight |
Highlighted cells mark the better spec: Dragonfly OSMO 3P in blue, Portal 3 in amber. A blank spec is never counted as a win. GearScore is the overall rating (0 to 100); re-weight it on the full tent comparison. Prices are current MSRP.
Put the NEMO Dragonfly OSMO 3P next to the SlingFin Portal 3 and the trade-offs are clear. They are close enough that this really is about which handful of specs you weight most.
The Dragonfly OSMO 3P is 6 oz lighter, better space-to-weight, and $70 cheaper. The Portal 3 is more floor area (41.5 vs 41.2 sq ft) and taller (44 vs 42 in peak). Their GearScores land within a couple of points (77 vs 76), so neither runs away with it.
Pick the Dragonfly OSMO 3P if you care most about low weight and space-to-weight, which makes it the better call for counting grams on long miles. Pick the Portal 3 if floor space and headroom matter more to you, or you are focused on comfort and room to move.
The NEMO Dragonfly OSMO 3P. It is 6 oz lighter than the Portal 3.
The SlingFin Portal 3. It is more floor area (41.5 vs 41.2 sq ft) than the Dragonfly OSMO 3P.
They are nearly tied at 77 and 76 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 Dragonfly OSMO 3P for low weight, or the Portal 3 for floor space. The spec table above shows exactly where each wins.