A web is a composition of fine micron metal fibers, which have metal tenacity and its strength, by uniformly lapping, laminating and sintering in high temperature to form a porous 3-dimensional non-woven web. It is combined with woven mesh at one or both sides to increase the strength, protect the fibers. This extremely porous metallic fiber fabric is also available with single layer formation, or multi-layers structure with coarse fibers to fine ones or the reverse, which allows high dirt holding capacity.