Abstract: A shoe design is expandable along its lengthwise axis utilizing one or both of a sliding outsole configuration or a sliding insole configuration. In one embodiment, the shoe has a multipart upper and/or multipart outsole interconnected by an expandable section made of a stretchable material which surrounds a pair of insole members arranged in an overlapping manner but allowed to move freely relative to one another as the expandable section expands or contracts. In one embodiment, the outsole of the shoe is slidably received within the heel of the shoe so as to allow for lengthwise expansion of the outsole as the upper portion of the shoe expands.