Adjustable fit shoe construction

A shoe comprising a bottom member, an upper member having two opposing side portions and a top portion, said bottom and upper members defining an enclosure, and an adjustment means disposed within the enclosure adjacent and along at least a portion of the bottom member, said adjustment means and said upper member defining a cavity for insertion of a foot, said shoe having a heel portion, a midportion and a toe portion, said cavity having a width extending between the two side portions at about the midportion of the shoe and also having a fitting height extending vertically from the adjustment means to the top portion of the upper member within the cavity at about the midportion, said cavity also having a defined circumference at about the midportion, said adjustment means being disposed in a position for changing the relationship between the width of the cavity and the fitting height of the cavity while maintaining the defined circumference substantially constant so as to improve the fit of the shoe, wherein said adjustment means comprises a fluid-containing bladder.