installed in separate layers one simple variant with in particular metallic fiber with a circular cross section which as described below is specially preformed has to be supported laterally by the spatial fabric in contrast in the u201c lamella arches u201d variant a lamella like semifinished product is woven in as described below and illustrated in fig4 specially shaped ribbons or lamellas 40 are woven into one of the fabric layers the lamella arches formed in this way are stable in the lateral direction owing to their cross sectional profile as a result of which their spring travel is directed predominantly perpendicularly to the input face in each case an elastic lamella arch produces an input face zone which can be perceived in a tactile fashion it is supported with a hinge like relatively tight curvature in each case at the bottom on one or more transversely extending fibers 48 in order to ensure that springing back occurs after activation these transversely extending fibers 48 conduct the horizontal forces into a lower tensile force resistant layer these arches should be composed of fibers lamellas or ribbon which are preformed in such a way that in each case a downward and an upward curvature and again a curvature in the initial direction occur along the surface at specific intervals said curvatures forming slight arches during the fixing of every second in particular every third.