Composite breathing cloth for sporting garments that comprises at least one layer having a yarn construction and that is provided with a multiplicity of filaments joining two upper and lower layers of said intermediate portion; said yarn construction being applied to upper and lower fabric layers constituting the cloth, by gluing and/or thermobonding and/or stitching. The cloth is suitable for the construction of bottoms for cycling shorts. Between the upper and/or lower layers of fabric and the yarn construction layer, one or more layers of foam can also be inserted, according to the methods already adopted in the prior art for constructing bottoms.