First, the fibers are divided into different colors - depending on the needle punch design. There are fine and coarse fibers with a fineness of 17-135 dtex (decitex). The unit of measurement decitex indicates the weight of a thread in relation to its length. In a complex weighing and mixing process, staple fibers are pre-needled from bales by means of grinding, carding and cross-laying to form a fiber fleece. The fiber fleece produced in this way is then finish needled as a flat felt in a second work step and connected to the carrier material. In a third step, the goods are foam-impregnated with a latex binder in a full bath and then dried.