Sole structures and articles of footwear having separate outsole and midsole components

A three-piece footwear structure comprising:

• an outer cage component formed as a unitary, one-piece construction that includes:
• (i) an outsole portion including a plurality of traction elements, and (ii) an upper portion, wherein the outer cage component defines an interior chamber, wherein the interior chamber includes a footbed portion formed by an interior surface of the outsole portion, the footbed portion including a plurality of recesses, wherein each of the plurality of recesses extends into an interior of each of the plurality of traction elements and defines an undercut within the interior of each of the plurality of traction elements;
• a foot support component which fits inside of the outer cage component and is formed as a unitary, one-piece construction that includes:
• (i) a top surface for supporting an entire plantar surface of a wearer's foot and (ii) a bottom surface opposite the top surface, wherein the bottom surface includes a plurality of traction element inserts, wherein each of the plurality of traction element inserts extends into a respective one of the plurality of recesses, wherein each of the plurality of traction element inserts includes an enlarged free end positioned to engage a respective undercut and secure each of the plurality of traction element inserts within a respective one of the plurality of recesses;
• an inner upper component which fits inside of the outer cage component and is formed as a unitary, one-piece construction that defines a foot-receiving chamber including a bottom surface, a heel-containing region, a midfoot-containing region, and a forefoot-containing region, wherein the inner upper component is formed of a knit-fabric material;
• and
• wherein the bottom surface of the inner upper component includes a plurality of openings, wherein each of the plurality of openings is at least partially aligned with a respective one of the plurality of recesses.