Abstract: An article of footwear includes an outsole having a bottom walking surface and a depressed top surface surrounded by an upstanding peripheral sidewall having a upper peripheral edge, an upper attached to the outsole, and a replaceable inner sole. The upstanding peripheral sidewall and depressed top surface of the outsole together define a cavity lying generally below the upper peripheral edge. The upper and outsole together define a volume disposed over the cavity and generally above the upper peripheral edge, the volume sized comfortably accommodate a wearer's foot. The replaceable inner sole has a body sized and shaped to fit snugly within the cavity portion, generally removed from encroachment of the volume, while supporting a wearer's foot within the volume.