Synthetic Leather and Air Mesh Upper - Lightweight comfortable and breathable enhancing performance and fit. * Trusstic - Plastic bridge under the arch which gives the shoe strength and stability without loss of flexibility. * Forefoot GEL - Attenuates shock during the impact phase, greatly cushioning each step. For great movement on your toes. * NC Rubber - Provides better traction on court surfaces. * Removable Sockliner - A sockliner which can be removed to accommodate a medical orthotic.