We developed this one in the late ‘90s for some members of U.S. Olympic Racewalking Team. It’s extremely lightweight and flexible, and we achieved those characteristics by reducing the amount of Clarino® synthetic leather in the upper, shortening the heel counter, and using a blown rubber outersole with a bare minimum of midsole. Please understand that this shoe is intended to provide just enough protection to serious competitors who would just as soon race barefoot if they could. Also, in many cases, the components of the Competition Racewalker will not have enough bulk to permit resoling. But if you’re going for the gold, this is your shoe.