An article of footwear is disclosed that includes an upper and a sole structure. The upper includes a matrix structure that defines a plurality of apertures. The apertures may have an elongate configuration to impart differences in the extensibility of the upper in different directions. For example,...http://www.google.co.uk/patents/US20060283042?utm_source=gb-gplus-sharePatent US20060283042 - Article of footwear having an upper with a matrix layer
