PRO Endur Distance is a technically advanced running shoe with responsive shock absorption adapted to serious runners. The entire midsole is made of lightweight and highly responsive Px Foam™ for efficient launch and soft landing. The shoe is too carefully shaped to provide a perfect balance between low weight, good stability and maximum response. The upper part is made of highly functional mesh for effective moisture transport and good comfort. Developed for racing at the highest level. Px Foam™. Px Foam™ is an ultralight material used in the midsole for optimal responsive cushioning and good flexibility. This innovative materials have an extremely low density and are 20% lighter than traditional EVA. The low weight in combination with responsive cushioning makes Px Foam™ a perfect choice for intense running for long periods.