A sole structure for an article of footwear , the sole structure comprising: a sole body portion , the sole body portion including an outsole surface facing away from the article of footwear and an upper surface disposed opposite the outsole surface ; and a central ridge element disposed within an aperture in the sole body portion , the aperture being located within a forefoot region and extending in a longitudinal direction to a midfoot region of the sole structure , the aperture being located between a medial side and a lateral side of the sole structure; the central ridge element including a bottom surface configured to engage a ground surface and a top surface disposed opposite the bottom surface ; the bottom surface of the central ridge element extending above the outsole surface of the sole body portion when the central ridge element is in an uncompressed condition; and wherein the central ridge element is configured to move vertically within the aperture in the sole body portion so that the bottom surface of the ridge element moves closer towards the outsole surface of the sole body portion when the central ridge element is in a compressed condition, characterised in that the top surface of the central ridge element is attached to a base layer , and wherein the base layer is attached to the upper surface of the sole body portion so that the central ridge element is permitted to wobble and independently move in at least a vertical direction within the aperture in the sole body portion ; and and in that the top surface of the central ridge element is located at a top end where the central ridge element has a smaller perimeter circumference than an opposite bottom end where bottom surface is located. a sole body portion , the sole body portion including an outsole surface facing away from the article of footwear and an upper surface disposed opposite the outsole surface ; and a central ridge element disposed within an aperture in the sole body portion , the aperture being located within a forefoot region and extending in a longitudinal direction to a midfoot region of the sole structure , the aperture being located between a medial side and a lateral side of the sole structure; the central ridge element including a bottom surface configured to engage a ground surface and a top surface disposed opposite the bottom surface ; the bottom surface of the central ridge element extending above the outsole surface of the sole body portion when the central ridge element is in an uncompressed condition; and wherein the central ridge element is configured to move vertically within the aperture in the sole body portion so that the bottom surface of the ridge element moves closer towards the outsole surface of the sole body portion when the central ridge element is in a compressed condition, characterised in that the top surface of the central ridge element is attached to a base layer , and wherein the base layer is attached to the upper surface of the sole body portion so that the central ridge element is permitted to wobble and independently move in at least a vertical direction within the aperture in the sole body portion ; and and in that the top surface of the central ridge element is located at a top end where the central ridge element has a smaller perimeter circumference than an opposite bottom end where bottom surface is located. <EOS>