Aerodynamic device for a vehicle

An aerodynamic device arranged for mounting to a vehicle or a trailer for reducing the wind resistance of the vehicle/trailer comprising a cargo space, the aerodynamic device comprising

• at least one sheet material, each sheet material being arranged to be mounted to the vehicle/trailer such that each sheet material is associated with a corresponding wall portion of the vehicle/trailer, each wall portion having an outer surface and an inner surface (17, 18, 28), the inner surface facing the cargo space, the wall portion furthermore extending towards the rear (19) of the vehicle/trailer, where, in a deployed first state, each sheet material is arranged to at least partly extend beyond a rearmost position of the wall portion, wherein in a stored second state, each sheet material is arranged to be inserted such that is faces towards the inner surface, the at least one sheet material comprising a first sheet material and a second sheet material, each sheet material being arranged to he mounted to the vehicle/trailer such that the first sheet material is associated with as first wall portion of the vehicle/trailer, and the second sheet material is associated with a second wall portion of the vehicle/trailer, the wall portions being mutually parallel, the outer surfaces facing away from each other and the inner surfaces facing towards each other,
• each sheet material comprising a first sub-sheet and a second sub-sheet, where the first sub-sheet sheet is closer to the corresponding wall portion than the second sub-sheet, and where the first sub-sheet and the second sub-sheet are connected to each other at the outer edge, where furthermore the first sub-sheet is arranged to travel a longer distance than the second sub-sheet when the sheet material is moved from the stored second state to the deployed first state.