Sapiranga is a city in Brazil in the state of Rio Grane do Sul with a population of roughly 80,000 inhabitants. It is located in an industrial area called "Vale do Sinos" (Sinos Valley), by the Sinos River. The town's economy relies heavily on the shoe industry. Other industries are present, but mostly linked to the shoe manufacturing process, such as metallurgic plants in which machinery is built to later be employed in the production of shoes.