The Mizuno Wave Inspire 13 helps correct your running stride for a smooth, more natural run from your first step to the last. Engineered mesh upper for a breathable, flexible fit that moves with you. U4ic midsole for respnsive energy return with every step. Double Fan Wave adds support, while sculpted lateral forefoot creates a more stable platform. U4icX heel wedge adds soft cushioning where you need it most. Durable rubber outsole for traction on any surface. Wt. 11.0 oz.