Think Tank DarkLight 25L vs Think Tank Shape Shifter 25L
The Think Tank DarkLight 25L is 25L and 1.82kg4lb; the Think Tank Shape Shifter 25L is 25L and 1.72kg3.8lb. The Think Tank Shape Shifter 25L is 0.1kg0.2lb lighter. The Think Tank DarkLight 25L costs $60 less. The Think Tank DarkLight 25L fits the carry-on limit of 14 of 36 major airlines and the Think Tank Shape Shifter 25L fits 36; under the seat, 0 and 8 of 26.
| Spec | Think Tank DarkLight 25L | Think Tank Shape Shifter 25L |
|---|---|---|
| Price | $239.75Best | $299.75 |
| Volume | 25L | 25L |
| Weight | 1.82kg4lb | 1.72kg3.8lbBest |
| Carry-on compliance | 39% | 100%Best |
| Personal-item compliance | 0% | 31%Best |
| Dimensions | 52×30.5×24.1cm20.5×12×9.5in | 43×30×17.9cm17×12×7in |
| Laptop | 16"Best | 15" |
| Bottle pockets | 1 | n/a |
| Opening | Panel access, back panel + top | n/a |
| Warranty | Lifetime | Lifetime |
| Organizer | No | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | No | No |
| Rain cover | Yes | Yes |
| MOLLE | Yes | No |
| Hip belt | Removable | Removable |
| Sternum strap | No | Yes |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | Yes | Yes |
| Camera compartment | Yes | Yes |
| Bike-ready | No | No |
| Material | 600D polyester PU, 1680D ballistic nylon, PFC-free DWR | 420D Velocity nylon, 300D diamond weave polyester, 600D polyester |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Think Tank DarkLight 25L | Think Tank Shape Shifter 25L |
|---|---|---|---|
| Air Arabia | Carry-on | Too big | Fits |
| Air Canada | Carry-on | Too big | Fits |
| Air India | Carry-on | Too big | Fits |
| AirAsia | Carry-on | Too big | Fits |
| Alaska Airlines | Carry-on | Too big | Fits |
| Allegiant Air | Personal item | Too big | Fits |
| American Airlines | Carry-on | Too big | Fits |
| American Airlines | Personal item | Too big | Fits |
| British Airways | Personal item | Too big | Fits |
| Cebu Pacific | Carry-on | Too big | Fits |
| Delta Air Lines | Carry-on | Too big | Fits |
| easyJet | Personal item | Too big | Fits |
| Emirates | Carry-on | Too big | Fits |
| Frontier Airlines | Personal item | Too big | Fits |
| JetBlue Airways | Carry-on | Too big | Fits |
| JetBlue Airways | Personal item | Too big | Fits |
| LATAM Airlines | Personal item | Too big | Fits |
| Lufthansa | Carry-on | Too big | Fits |
| Norwegian Air Shuttle | Carry-on | Too big | Fits |
| Qantas | Carry-on | Too big | Fits |
| Qatar Airways | Carry-on | Too big | Fits |
| Ryanair | Carry-on | Too big | Fits |
| SAS | Carry-on | Too big | Fits |
| Turkish Airlines | Carry-on | Too big | Fits |
| United Airlines | Carry-on | Too big | Fits |
| Vietjet Air | Carry-on | Too big | Fits |
| Volaris | Personal item | Too big | Fits |
| Vueling | Carry-on | Too big | Fits |
| WestJet | Carry-on | Too big | Fits |
| Wizz Air | Carry-on | Too big | Fits |
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Specs come from each brand's own product page. Fit uses listed dimensions in any orientation. How we score carry-on fit.