The Pwr Nitro Squared Is Back For Another Season Of Train Puma. This Shoe Offers A Dual Density Nitro Foam Outsole With A Midsole Banking To Support You During Lateral Movements. You'll Get Rebounding And Cushioning As You Work Out, So Your Feet - And Your Core - Can Feel Comfortable, Stable And Supported During High-Intensity Training. Plus, When You're Out And About, This Model Is A Total Eye-Catcher.