Mizuno Wave Inspire 5 Stability Running Shoe Womens SmoothRideTM Engineering approach to minimize the rapid acceleration and deceleration of the foot during transition, creating the smoothest ride possible AP Mid Sole Lightweight, responsive, yet durable cushioning copolymer. VS-1 Shock-absorbing cushioning compound found in the heel. Mizuno Intercool Full-length midsole ventilation system reduces heat and humidity build-up inside the shoe.