NIKE Womens Flex Trainer 3 Training Shoe Atomic Violet/Vivid Blue/Glacier Ice mesh Mesh and foam combination upper pattern provides superior comfort and support specific to multidirectional training Injected unit sole Phylon midsole provides lightweight cushion. Midsole wrap in forefoot enhances support and stability Engineered multidirectional flex grooves were designed to enhance flexibility specific to training while minimal rubber pods provide traction