An article of footwear is disclosed and includes an upper and a support assembly positioned beneath the upper. The support assembly may include a top member, a chamber assembly positioned beneath the top member, having a base member and a plurality of hollow support members extending upwardly from the base member. A bottom plate may be secured to a bottom surface of the chamber assembly, sealing the hollow projections and forming at least one closed chamber. An outsole may be positioned beneath the support assembly.