US Patent 7810257 Article of footwear with removable upper

An article of footwear includes a sole assembly having a midsole having an upper surface, a frame recess and a first registration recess being formed in the upper surface. A frame member is seated in the frame recess, and has a first end secured to the midsole, a second end free of the midsole, and a first registration member extending downwardly from a lower surface of the frame member. The first registration member is received in the first registration recess. An upper is removably attached to the sole assembly, and has a pocket on a bottom surface thereof, with the second end of the frame member being received in the pocket.