Article of footwear including a sole structure

An article of footwear comprising:

• an upper including an interior void;
• a sole disposed within the interior void of the upper, wherein the sole includes one or more extensions received by a ground-facing layer of the upper such that the combination of the one or more extensions and the ground-facing layer of the upper is configured to form one or more supports, wherein a plurality of ridges is disposed between adjacent ones of the one or more supports;
• and
• a cushioning element extending from a posterior end of the article of footwear to an anterior end of the article of footwear, the cushioning element including a first set of bulbs and a second set of bulbs, wherein the one or more supports engage the first set of bulbs,
• wherein a gap that is open to the external environment is disposed between the plurality of ridges and the cushioning element, the gap defined at a bottom end by an exposed first surface of the cushioning element and the gap defined at a top end by the plurality of ridges of the upper.