The Hoka One One Mach Supersonic is a limited release of Hoka's well-loved mach 4. It's marketed as its racing/speed-oriented sibling. As a racer, it fails. And as a tempo trainer, it doesn't really stand out. But if you want to have a snappy training run, it won't disappoint. Even more, it maintains the defining qualities of the Mach such as lightweight design and propulsive toe-offs.