REI Co-op Ruckpack 18 vs. Oppose This Invisible Carry-On
Two carry-on travel backpacks, compared spec for spec.
REI Co-op Ruckpack 18
| Capacity | 18 L |
| Weight | 0.7 kg |
| Dimensions | 44×26×18 cm |
| Airline fit | 96% |
| Price | $65 |
Feature by feature
| REI Co-op Ruckpack 18 | Feature | Oppose This Invisible Carry-On |
|---|---|---|
| Storage | ||
| Compression | ||
| None | Expanded Capacity | None |
| 0 | Opening | 0 |
| side | Passport | top |
| N | Passthrough | N |
| Carry | ||
| Backpack | ||
| removable | Hip Belt | N |
| removable | Sternum Strap | removable |
| Inside | ||
| 15in | Laptop | 15in |
| 2 | Main Compartments | 4 |
| Y | Organizer | Y |
| Outside | ||
| × | Hard Shell | × |
| N | Rain-fly | N |
| Water Bottle Holder | ||
| Y | Water Resistant | Y |
| Material | |
| 210-denier nylon ripstop | Shell: 800x600D lightweight waterproof nylon-polyester blend |
Oppose This Invisible Carry-On
| Capacity | 24 L |
| Weight | 1.5 kg |
| Dimensions | 53×35×15 cm |
| Airline fit | 88% |
| Price | $250 |
Key differences between the REI Co-op Ruckpack 18 and Oppose This Invisible Carry-On
- Passport pocket: Side on the REI Co-op Ruckpack 18; Top on the Oppose This Invisible Carry-On.
- Hip belt: Removable on the REI Co-op Ruckpack 18; No on the Oppose This Invisible Carry-On.
- Main compartments: 2 on the REI Co-op Ruckpack 18; 4 on the Oppose This Invisible Carry-On.
Both have: sternum strap, laptop sleeve, built-in organizer, water resistant.
Which airlines take each bag as a carry-on
We checked both bags against the carry-on size limits of 189 airlines. 166 accept both. 15 accept only the REI Co-op Ruckpack 18, and 0 accept only the Oppose This Invisible Carry-On.
Only the REI Co-op Ruckpack 18 fits
Air Niugini, Air Tahiti, American Eagle, Belavia, Cayman Airways, easyJet, Etihad Airways, Great Lakes Airlines, Gulf Air, Oman Air, Qatar Airways, Ravn Alaska, Regional Express, Royal Jordanian, Virgin Australia.
REI Co-op Ruckpack 18 vs. Oppose This Invisible Carry-On: which should you pack?
The Oppose This Invisible Carry-On carries 6L more than the REI Co-op Ruckpack 18 (18L vs. 24L), while the REI Co-op Ruckpack 18 is the lighter pack at 0.7kg (vs. 1.5kg). For carry-on flexibility, the REI Co-op Ruckpack 18 fits 96% of the airlines we track — the higher of the two. If you prioritise packing volume, choose the Oppose This Invisible Carry-On; if you want to travel lighter, the REI Co-op Ruckpack 18 is the better call.