Features: Lightweight and seamless double jacquard mesh for maximum ventilation and comfort. MORPHIT lacing system - a multi-dimensional lacing design that comfortably harnesses the foot securely during dynamic movement. Medial EVA arch sidewalls help to slow the rate of pronation and provides midfoot support. Full length QU!KFOAM for springy responsiveness. External QU!K spine (TPU shank) for dynamic stability. Fitz-Rite midfoot interior utilizes a distinct pattern to support the foot medially and laterally. QU!K flex 4 foot engineering provides for natural and balanced toe off while enhancing ground contact for better acceleration.