Osprey Nebula vs. Attitude Supply ATD1
Two carry-on travel backpacks, compared spec for spec.
Feature by feature
| Osprey Nebula | Feature | Attitude Supply ATD1 |
|---|---|---|
| Storage | ||
| 4 | Compression | 4 |
| None | Expanded Capacity | 55L |
| 1 | Opening | 1 |
| top | Passport | front |
| N | Passthrough | N |
| Carry | ||
| Y | Backpack | Y |
| removable | Hip Belt | removable |
| Y | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 15in |
| 3 | Main Compartments | 2 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| 2, side | Water Bottle Holder | 2, side |
| Y | Water Resistant | Y |
| Material | |
| MAIN: 420HD Nylon Packcloth BOTTOM: 420HD Nylon Packcloth | 500d, PU coated Cordura with DWR |
Attitude Supply ATD1
| Capacity | 20 L |
| Weight | 1.5 kg |
| Dimensions | 50×30×26 cm |
| Airline fit | 17% |
| Price | $447 |
Key differences between the Osprey Nebula and Attitude Supply ATD1
- Passport pocket: Top on the Osprey Nebula; Front on the Attitude Supply ATD1.
- Sternum strap: Yes on the Osprey Nebula; Removable on the Attitude Supply ATD1.
- Main compartments: 3 on the Osprey Nebula; 2 on the Attitude Supply ATD1.
Both have: compression straps, backpack straps, hip belt, laptop sleeve, built-in organizer, water bottle pockets, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 25 accept both. 0 accept only the Osprey Nebula, and 7 accept only the Attitude Supply ATD1.
Only the Attitude Supply ATD1 fits
Copa Airlines, Frontier Airlines, Island Air, PenAir, Southwest Airlines, Spirit Airlines, Sun Country.
Osprey Nebula vs. Attitude Supply ATD1: which should you pack?
The Osprey Nebula carries 14L more than the Attitude Supply ATD1 (34L vs. 20L), while the Osprey Nebula is the lighter pack at 1kg (vs. 1.5kg). For carry-on flexibility, the Attitude Supply ATD1 fits 17% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Osprey Nebula; if you want to travel lighter, the Osprey Nebula is the better call.