Abstract: A series of interchangeable stackable intermediate core sole modules have mating interlocking post and hole connectors and mating hook and loop fasteners and edge ridges for stacking a series of the core modules. Footwear uppers have a conventional top foot accommodating structure and a bottom surface with mating components to interconnect with the core modules. Footwear bottoms have a bottom surface with conventional soles and have an upper surface with mating components to interconnect with the core modules. Interchangeable core modules vary in material, color, texture, style, shape, thickness, and other physical features for individualizing footwear.

Abstract: A series of interchangeable stackable intermediate core sole modules have mating connectors for stacking a series of the core modules. Footwear uppers have a conventional top foot accommodating structure and a bottom surface with mating components to interconnect with the core modules. Footwear bottoms have a bottom surface with conventional soles and have an upper surface with mating components to interconnect with the core modules. Interchangeable core modules vary in material, color, texture, style, shape, thickness, and other physical features for individualizing footwear.