a net - shaped protective material for wire harness sheathing which has flame retardancy and is free from mesh deformation . vertical strands and horizontal strands which are constituted of a flame - retardant resin wire having an elliptic sectional shape have been pressed and hot melt bonded at the intersections thereof to form a net shape . the vertical strands and horizontal strands are superposed at the intersections without interlacing , and one or both of the vertical strands and horizontal strands are melted in a state where 40 % to 50 % of the sectional area has been melted and embedded in the other strands . the protective metal has a cut end which has undergone fraying prevention processing .