Breathable mesh and synthetic uppers materials. External heel counter aids in stabilizing the heel. Reflective hits for added visibility in low lighting. Plush tongue and collar. Breathable fabric lining for a great in-shoe feel. Removable foam insole. IMEVA midsole provides increased shock attenuation, responsive cushioning and lasting durability. Midsole Height:Heel/Toe: 29 mm/17 mmDifferential: 12 mm Heel Grid system for stable cushioning in the heel. XT-600â" carbon rubber outsole material delivers optimal abrasion resistance and traction.