Knitted upper Responsive midsole PUMA Formstrip on the medial and lateral sides Durable performance rubber compound outsole designed for all-surface traction Her Fit, Her Workouts, Her Style. The Pwr Xx Nitro Training Shoe Is Specifically Engineered To Provide Support For Women’S Feet. It Has A Nitro Infused Midsole That Provides Superior Cushioning And Responsiveness, Along With A Pumagrip Outsole To Provide Traction For Both Floorwork And Runs On The Treadmill.