Mizuno C.O.B. Technology: Mizuno C.O.B. midsole has a textured upper surface that is linked with the outsole and directly transmits information from the ground to the bottom of the feet. By increasing sensitivity under foot, Mizuno COB technology enables enhanced feedback from the feet to aid in balance and, ultimately, allow you to pursue improved athletic performance. Knit Upper: Completely knit upper construction for a 3 dimensional smooth fit for all types of feet. Booty Construction: Located inside the shoe to provide a soft and secure fit. Soft PU Midsole: Allows for natural flexibility that works with your body's movements. Internal Support Straps: Strategically placed in the midfoot to keep the fit close to your foot during active movements.