The TRABUCO MAX™ 4 shoe is designed to help you navigate the trails with less effort.FF BLAST™ PLUS ECO technology is placed in the midsole to create effortless impact absorption while propelling your momentum forward. This material also creates a more dynamic feel that helps keep the shoe lightweight.GUIDESOLE™ technology is strategically positioned to create an easy forward roll. Additionally. it's scientifically proven to help increase your potential to run further while using less energy.