A roller shutter solution with a very sophisticated design, intended for both new and refurbishment projects. The improvements from the previous generation ensure superior performance, including a full seal across the curtain surface and between the window and the guide rails, even in heavy rain. A premium advantage is that the box can be fully concealed under the plasterwork for a flush, neat and eye-appealing finish. This system is an advanced and highly functional solution thanks to the box end profile and the PVC reinforcing shape within the insulation wedge piece.