The proposal aims to redefine the trailers and provide them with a degree of flexibility that ensures their ability to adapt the individual needs of each customer. It explores the opportunities of prefabrication along with the restrictions of the rules of transportation, aiming to the creation of stimulating living environments which support a mobile way of living. It is a typology of embaticaly designed structural skeletons, on to which a series of transformations that increase the living area, surfaces which transform, or are divided by lines or columns of windows, can be adjusted according to the buyers wish. The maximization of the dwelling program within the flexible envelope is achieved with the use of multi-functioning furniture and optimum storage spaces, which are all designed as subdivisions of the embat, thus combined together in multiple ways.