An intermediate sole structure of an article of footwear having an upper , the intermediate sole structure comprising: a foamed thermoplastic sole component including: a foamed thermoplastic base layer ; and a foamed thermoplastic outer layer that is integrally formed with the foamed thermoplastic base layer , the outer layer including a plurality of sipes extending through the outer layer and terminating at the base layer ; wherein the thermoplastic sole component has an inner surface defined by the base layer , an opposite, outer surface defined by the outer layer , and a thickness defined between the inner surface and the outer surface ; wherein the inner surface is substantially planar and is operative to be adhered to a ground-facing surface of the upper , and wherein the thickness is smaller at a peripheral edge of the sole component than within a central region ; wherein the sole structure is configured to be thermoformed to the upper , and some or all of the plurality of sipes splay as a result of bending that occurs in the base layer ; wherein the sole structure is positioned adjacent to the ground-facing surface of the upper , and then is to be thermoformed against the upper to draw an adhesive into contact with the ground-facing surface of the upper , and such that at least a portion of the sole structure bends into contact with a sidewall of the upper ; wherein the sole component has a lateral dimension that is larger than a corresponding lateral dimension of the upper intended to be coupled with the sole structure ; and wherein the sole component comprises a lateral portion operative to bend into contact with a lateral sidewall of the upper and a medial portion operative to bend into contact with a medial sidewall of the upper . a foamed thermoplastic base layer ; and a foamed thermoplastic outer layer that is integrally formed with the foamed thermoplastic base layer , the outer layer including a plurality of sipes extending through the outer layer and terminating at the base layer ; wherein the thermoplastic sole component has an inner surface defined by the base layer , an opposite, outer surface defined by the outer layer , and a thickness defined between the inner surface and the outer surface ; wherein the inner surface is substantially planar and is operative to be adhered to a ground-facing surface of the upper , and wherein the thickness is smaller at a peripheral edge of the sole component than within a central region ; wherein the sole structure is configured to be thermoformed to the upper , and some or all of the plurality of sipes splay as a result of bending that occurs in the base layer ; wherein the sole structure is positioned adjacent to the ground-facing surface of the upper , and then is to be thermoformed against the upper to draw an adhesive into contact with the ground-facing surface of the upper , and such that at least a portion of the sole structure bends into contact with a sidewall of the upper ; wherein the sole component has a lateral dimension that is larger than a corresponding lateral dimension of the upper intended to be coupled with the sole structure ; and wherein the sole component comprises a lateral portion operative to bend into contact with a lateral sidewall of the upper and a medial portion operative to bend into contact with a medial sidewall of the upper . <EOS>