Gently worn and in great condition! The Rundown Learn to Fly. Everyday. The lovechild of Mach 4 and Mach Supersonic, this lively pavement pounder is built for performance and ready to race. Sporting a stripped back creel mesh upper and lay-flat tongue, the new Mach 5 delivers a snappier ride with PROFLY’s stacked midsole setup, offering a lightweight, responsive foam directly underfoot and rubberized EVA below.