Abstract: In this cover structure, the reinforcing is formed by strips (1) or wires which are spaced from one another, of a material which is capable of providing resistance to the passage of a sharp object, each strip or wire having a meandering configuration formed by curved patterns and/or by patterns comprising regularly repeated rectilinear segments (2, 3), similar patterns of the various strips or wires being disposed in a manner such that they are juxtaposed or fit into one another in corresponding positions, such that each strip or wire is spaced from the adjacent strips or wires with a spacing such that a cutting object driven along a rectilinear path will, of necessity, encounter a strip or a wire in every direction on its path. See FIG. 1A.