A shoe system is provided that comprises a removable upper unit and a sole unit that can be interconnected utilizing respective upper and lower connecting means. The sole unit can include a support panel that can extend substantially continuously about a periphery of the sole unit. A lower portion of the support panel can be connected to an interior area of the sole unit and an upper portion can extend generally upwardly from the lower portion and be disposed circumferentially within the interior of a lower connecting means along the sole periphery. The support panel can be so configured so as to provide structural strength to the shoe system when worn to resist transverse force and reduce tactile friction of the user's foot against the upper and lower connecting means.