The mask (1) has a U-shaped frame (2) comprising central fixing units i.e. pins (40), in its central portion, where the frame and a thermoplastic mask material (3) are firmly connected with each other. The frame is partially manufactured from polycarbonate, and the central fixing units are attached to a control unit and to an outer surface of legs (12a, 12b) of the frame. The legs are interconnected by a connection rod (11), and a pivot (30) is arranged in a middle of the connection rod. A knuckle expands the legs of the frame. An independent claim is also included for a storage device comprising a base board.
