Lightweight, seamless, double-jacquard mesh offers maximum ventilation and comfort. QU!KFOAM midsole, from an EVA rubber blend, provides responsive cushioning, proven to maintain the same high level of energy return and long-lasting comfort throughout the lifetime of the shoe. Medial post, paired with the QU!KSPINE carbon fiber plate, provides enhanced stability and integrity to the midfoot. Fitz-Rite midfoot features soft internal webbing that keeps the foot comfortably secure. Lace-up closure and MORPHIT upper-lacing system designed to comfortably harness the foot during dynamic movement. Pressure-Free Tongue designed to provide comfort and reduced irritation, with thin-padding positioned to avoid stress at the top of the foot. Breathable textile linings.