The technology described herein provides a dynamic foot-arch support assembly for dynamically supporting the arch and structures of the human foot throughout phases of the biomechanical movement of the foot during weight-bearing activities. A dynamic foot-arch support assembly for supporting the arch and structures of a foot is provided that includes a support band having an upper end and a lower end, the support band forming a loop at the upper end through which to place a foot and position the loop around or just below an ankle portion of the foot, the lower end configured to wrap from an inside area of the ankle portion of the foot and rotate to an underside of the foot for secure attachment below the underside of the foot, the support band thereby configured to provide a tension to support an arch area of the foot, and a shoe sole, the lower end configured secured to the shoe sole.