The Catalyst 2 is another Mizuno model incorporating a Wave plate, but it’s much different from the Inspire. The Catalyst is lighter and runs lower to the ground than the Inspire, and it rides firm in classical Mizuno style. The Catalyst is one of the lighter shoes on this list, giving it great range and versatility. You can count on the Catalyst for the responsiveness you need on your faster days and the cushion you need for easy days and longer runs.