Article of footwear with adaptive fit

An article of footwear, comprising:

• an upper including a bottom portion and a lower region coupled to the bottom portion;
• a sole comprising a middle sole assembly and an outer sole assembly;
• the outer sole assembly including a peripheral sole portion that wraps up around and attaches to the lower region of the upper;
• the outer sole assembly including a lateral outer sole member and a medial outer sole member, wherein the lateral outer sole member and the medial outer sole member are spaced apart by a gap;
• the middle sole assembly including a lateral middle sole member and a medial middle sole member, wherein the lateral middle sole member and the medial middle sole member are spaced apart by a groove;
• an intermediate layer connecting the middle sole assembly and the outer sole assembly;
• wherein the bottom portion of the upper is located inwardly of the middle sole assembly;
• wherein the intermediate layer is more elastic than the outer sole assembly;
• wherein the intermediate layer is more elastic than the middle sole assembly;
• and
• wherein the gap is vertically aligned with the groove.