Vertx Ready Pack X vs Zero Halliburton ZEST3 Large Expandable Backpack
The Vertx Ready Pack X is 20L and 1.29kg2.8lb; the Zero Halliburton ZEST3 Large Expandable Backpack is 20L and 1.32kg2.9lb. The Vertx Ready Pack X is 0.03kg0.1lb lighter. The Vertx Ready Pack X costs $327.01 less. The Vertx Ready Pack X fits the carry-on limit of 36 of 36 major airlines and the Zero Halliburton ZEST3 Large Expandable Backpack fits 36; under the seat, 8 and 1 of 26.
| Spec | Vertx Ready Pack X | Zero Halliburton ZEST3 Large Expandable Backpack |
|---|---|---|
| Price | $222.99Best | $550 |
| Volume | 20L | 20L |
| Expands to | n/a | 25L |
| Weight | 1.29kg2.8lbBest | 1.32kg2.9lb |
| Carry-on compliance | 100% | 100% |
| Personal-item compliance | 31%Best | 4% |
| Dimensions | 41.9×27.9×19.1cm16.5×11×7.5in | 46×28×15cm18×11×6in |
| Laptop | 15" | 15.6"Best |
| Compartments | n/a | 2 |
| Bottle pockets | 2 | n/a |
| Opening | Zippered main compartment | n/a |
| Warranty | 2 years | 10 years |
| Organizer | Yes | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | No | No |
| MOLLE | Yes | No |
| Hip belt | No | No |
| Sternum strap | Yes | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | No | No |
| Material | 500D nylon and 420D nylon mini ripstop shell, 210HD nylon PU-coated lining | 840-denier CORDURA twill nylon with smooth leather accents |
| Last checked | 2026-09 | 2026-10 |
Where their airline fit differs
| Airline | Limit | Vertx Ready Pack X | Zero Halliburton ZEST3 Large Expandable Backpack |
|---|---|---|---|
| Allegiant Air | Personal item | Fits | Too big |
| American Airlines | Personal item | Fits | Too big |
| British Airways | Personal item | Fits | Too big |
| easyJet | Personal item | Fits | Too big |
| JetBlue Airways | Personal item | Fits | Too big |
| LATAM Airlines | Personal item | Fits | Too big |
| Volaris | Personal item | Fits | Too big |
Add more bags to this comparison
Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.