A shoe sole is described that provides both cushioning and stability. The
sole has a plurality of layers, including a transition layer which allows
relative motion between the layers adjacent to the transition layer. The
relative motion between the layers of the sole reduces the impact of
horizontal shear stresses on the wearer's feet and ankles. One such
transition layer includes pliable material and deformable holes within
the pliable material. Another transition layer includes at least two
rigid plates held together by less rigid grommets or sidewalls. The
transition layer may be disposed beneath the entire shoe or only portions
of the shoe, with either a more conventional sole structure or rigid
support members completing the sole.