At present, footwear is considered as one of the most internationalized sectors of the Portuguese industry with a significant importance for the national economy, as it is proved by the economic data of 2012: the average annual production was 74 million of shoe pares, being 90.0% of the production exported, which represents an average value of 1610 million euros [l].Financiai support from COMPETE, QREN and EU (project QREN SI J&D Copromoção 13850 NEWALK) and FCT and FEDER under Program COMPETE (PEst-C/EQB/LA0020/2011 strategic project).info:eu-repo/semantics/publishedVersio
