The new Ambition 3 Mid TPU features Mizuno’s Translucent I-Shaped TPU studs, which provide a unique accent that also increases traction on multiple surfaces. Mizuno C-Flex Outsole: Mizuno's next innovation in outsole technology using a lightweight, rib construction, as well as a symmetric stud arrangement for enhanced stability, flexibility, and traction, while also providing increased comfort with reduced stud pressure. Translucent I-Shaped TPU Studs: Provide increased traction on multiple surfaces Full length midsole: Heel to toe cushioning for ultimate comfort. U4icX Strobel Lasting Board: Ensures a comfortable underfoot feel.