Abstract: A cabin module deployable inside a vehicle so as to form at least a portion of an interior of the vehicle. The cabin module comprises a main body and a plurality of external walls. One or more of the plurality of external walls are moveable with respect to the main body. The module has a closed configuration for storage outside the vehicle, in which the plurality of external walls define at least a part of a first form factor of the module. The module has an open configuration for operational deployment in the vehicle, in which the plurality of external walls define at least a part of a second form factor of the module. The cabin module is reversibly changeable between the closed configuration and the open configuration by movement of the one or more external walls. The first form factor is different from the second form factor.