An article of footwear comprising, in combination: an upper; a sole assembly; and a support assembly positioned in the sole assembly and including: a top layer of cushioning material; a plurality of vertically arranged pillars positioned beneath the top layer of cushioning material, each pillar comprising an inner layer of cushioning material and an outer layer surrounding the inner layer, the outer layer including: an upper portion including a first wall; a lower portion including a second wall; a parting line formed at a junction of the first and second walls; and a bottom layer of cushioning material positioned beneath the plurality of pillars, wherein the top layer of cushioning material, the inner layer of cushioning material and the bottom layer of cushioning material are of unitary construction and wherein the support assembly is exposed such that the pillars can be seen to extend between the top layer of cushioning material and the bottom layer of cushioning material. an upper; a sole assembly; and a support assembly positioned in the sole assembly and including: a top layer of cushioning material; a plurality of vertically arranged pillars positioned beneath the top layer of cushioning material, each pillar comprising an inner layer of cushioning material and an outer layer surrounding the inner layer, the outer layer including: an upper portion including a first wall; a lower portion including a second wall; a parting line formed at a junction of the first and second walls; and a bottom layer of cushioning material positioned beneath the plurality of pillars, wherein the top layer of cushioning material, the inner layer of cushioning material and the bottom layer of cushioning material are of unitary construction and wherein the support assembly is exposed such that the pillars can be seen to extend between the top layer of cushioning material and the bottom layer of cushioning material. a top layer of cushioning material; a plurality of vertically arranged pillars positioned beneath the top layer of cushioning material, each pillar comprising an inner layer of cushioning material and an outer layer surrounding the inner layer, the outer layer including: an upper portion including a first wall; a lower portion including a second wall; a parting line formed at a junction of the first and second walls; and a bottom layer of cushioning material positioned beneath the plurality of pillars, wherein the top layer of cushioning material, the inner layer of cushioning material and the bottom layer of cushioning material are of unitary construction and wherein the support assembly is exposed such that the pillars can be seen to extend between the top layer of cushioning material and the bottom layer of cushioning material. an upper portion including a first wall; a lower portion including a second wall; a parting line formed at a junction of the first and second walls; and a bottom layer of cushioning material positioned beneath the plurality of pillars, wherein the top layer of cushioning material, the inner layer of cushioning material and the bottom layer of cushioning material are of unitary construction and wherein the support assembly is exposed such that the pillars can be seen to extend between the top layer of cushioning material and the bottom layer of cushioning material.