591758 A reflective ground cover sheet material woven from warp and weft tapes of a plastics material wherein the average gap (g) between edges of adjacent tapes in both the warp and the weft direction is in the range about 0.l mm to about 1.2 mm and wherein the material is reflective of at least 50% of visible light (wavelength about 400-700nm) on at least one side of the material.
