Lowepro Whistler BP 450 AW II vs Think Tank Airport Accelerator 41L
The Lowepro Whistler BP 450 AW II is 36L and 3.09kg6.8lb; the Think Tank Airport Accelerator 41L is 41L and 2.8kg6.2lb. The Think Tank Airport Accelerator 41L is 0.29kg0.6lb lighter. The Lowepro Whistler BP 450 AW II fits the carry-on limit of 0 of 36 major airlines and the Think Tank Airport Accelerator 41L fits 1; under the seat, 0 and 0 of 26.
| Spec | Lowepro Whistler BP 450 AW II | Think Tank Airport Accelerator 41L |
|---|---|---|
| Price | n/a | $329.75 |
| Volume | 36L | 41L |
| Weight | 3.09kg6.8lb | 2.8kg6.2lbBest |
| Carry-on compliance | 0% | 3%Best |
| Personal-item compliance | 0% | 0% |
| Dimensions | 60×33×25.5cm23.5×13×10in | 49.5×34×26cm19.5×13.5×10in |
| Laptop | 15" | 16"Best |
| Bottle pockets | n/a | 2 |
| Opening | Panel access, top + body-side | n/a |
| Warranty | n/a | Lifetime |
| Organizer | No | Yes |
| Shoe compartment | No | No |
| Hydration sleeve | No | No |
| Frame sheet | No | No |
| Water-resistant | Yes | No |
| Rain cover | Yes | Yes |
| MOLLE | No | No |
| Hip belt | No | Removable |
| Sternum strap | No | No |
| Load lifters | No | No |
| Shoulder strap | No | No |
| Luggage pass-through | No | Yes |
| Camera compartment | Yes | Yes |
| Bike-ready | No | No |
| Material | Recycled 420D nylon ripstop with TPU dual laminate | 600D polyester, 1260D ballistic nylon, 420D nylon ripstop, DWR |
| Last checked | 2026-09 | 2026-09 |
Where their airline fit differs
| Airline | Limit | Lowepro Whistler BP 450 AW II | Think Tank Airport Accelerator 41L |
|---|---|---|---|
| Singapore Airlines | 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.