A shoe system comprising: a removable upper unit having a lower edge extending at least partially along a lower periphery of the upper unit, wherein the upper unit has an upper connector extending generally downwardly from the lower edge of the upper unit, and that the upper unit is configured to extend across at least a portion of a user's foot; a sole unit having a sole base and an upper edge extending generally upwardly therefrom, the sole base defining a sole periphery and an interior area, the upper edge extending at least partially about the sole periphery, wherein the sole unit has a lower connector extending generally upwardly from the upper edge, and wherein the lower connector is attachable to the upper connector of the upper unit in order to facilitate removable attachment of the upper unit to the sole unit, and the sole unit further having a support panel extending about at least a portion of the sole periphery, wherein the support panel has a lower portion and an upper portion, the lower portion of the support panel being attached to the sole base and extending generally inwardly toward the interior area relative to the sole periphery, the upper portion of the support panel extending generally upwardly from the lower portion and is disposed adjacent to and interiorly to the lower connector along the sole periphery, the upper portion of the support panel extends at least partially above the lower connector, characterized in that the sole unit further comprises a sole insert that is sized and configured to be received within the interior area of the sole base and wherein the sole insert is attachable to the lower portion of the support panel and to a top surface of the sole base for fixing the orientation of the support panel with respect to the sole base; and an insole having an insole periphery and a raised wall extending generally upwardly from the insole at least partially about the insole periphery, the insole being sized and configured to be fitted into the interior area of the sole base with the raised wall abutting at least a portion of an interior face of the support panel for supplementing the structural strength of the support panel against transverse force. a removable upper unit having a lower edge extending at least partially along a lower periphery of the upper unit, wherein the upper unit has an upper connector extending generally downwardly from the lower edge of the upper unit, and that the upper unit is configured to extend across at least a portion of a user's foot; a sole unit having a sole base and an upper edge extending generally upwardly therefrom, the sole base defining a sole periphery and an interior area, the upper edge extending at least partially about the sole periphery, wherein the sole unit has a lower connector extending generally upwardly from the upper edge, and wherein the lower connector is attachable to the upper connector of the upper unit in order to facilitate removable attachment of the upper unit to the sole unit, and the sole unit further having a support panel extending about at least a portion of the sole periphery, wherein the support panel has a lower portion and an upper portion, the lower portion of the support panel being attached to the sole base and extending generally inwardly toward the interior area relative to the sole periphery, the upper portion of the support panel extending generally upwardly from the lower portion and is disposed adjacent to and interiorly to the lower connector along the sole periphery, the upper portion of the support panel extends at least partially above the lower connector, characterized in that the sole unit further comprises a sole insert that is sized and configured to be received within the interior area of the sole base and wherein the sole insert is attachable to the lower portion of the support panel and to a top surface of the sole base for fixing the orientation of the support panel with respect to the sole base; and an insole having an insole periphery and a raised wall extending generally upwardly from the insole at least partially about the insole periphery, the insole being sized and configured to be fitted into the interior area of the sole base with the raised wall abutting at least a portion of an interior face of the support panel for supplementing the structural strength of the support panel against transverse force.