Elisa van Joolen collects all her materials from large international fashion companies. Many fashion companies have an abundance of items that are no longer used and, as a rule, are to be destroyed. They include overproduction, stock, samples or rejected designs. Fashion companies support Invert Footwear by donating products
The Invert Footwear collection consists of pairs of different brands of sneakers and flip-flops. For example, Elisa van Joolen turned sample models of Nike skate sneakers inside out and created new matching soles made of flip-flops. The Nike sole became new sandals. Each pair of shoes is unique.