NIKE Dart 9 Running Shoes Phylon Midsole - With natural motion engineering provides a smooth, well-cushioned ride. Waffle Outsole Pattern - Provides great traction and durability. TPU Midfoot - For superior light-weight support and to give your foot the comfort it needs. Breathable Leather / Mesh upper - Combined with a midfoot overlay to give you a great fit and comfort. Padded Heel - Cushioning for your ankles for when you are running hard.