An article of footwear comprises a shell (10) and preferably also a leg piece (20), and features, at least at some portions thereof that do not include the sole (15), a composite structure formed of two layers (30, 40; 30A, 40A) that are made of preferably synthetic materials having different mechanical properties. At least the interfacing surface (34, 34A) of the layer (30) made of mechanically stronger materials is provided with protruding elements (36) that remain inseparably adhering to the interfacing surface (42, 42A) of the other layer (40).