Article of footwear including a sole structure

An article of footwear comprising:

• a heel region including a posterior end of the article of footwear, a mid-foot region, and a forefoot region including an anterior end of the article of footwear;
• a lateral side, and a medial side opposite the lateral side;
• a medial-lateral axis, wherein the medial-lateral axis extends from the medial side to the lateral side;
• an upper;
• a sole structure, the sole structure coupled to the upper, and wherein the sole structure further comprises;
• a cushioning element disposed in the heel region, the cushioning element including a first tube and a second tube, wherein each of the first tube and the second tube extends from the lateral side of the article of footwear to the medial side of the article of footwear,
• wherein the first tube has a first width and the second tube has a second width, the first and second width each extending substantially parallel to the medial-lateral axis, and wherein the first width and the second width are different from one another.

An article of footwear comprising:

• a heel region including a posterior end of the article of footwear, a mid-foot region, and a forefoot region including an anterior end of the article of footwear;
• a lateral side, and a medial side opposite the lateral side;
• a vertical axis and a medial-lateral axis, wherein the medial-lateral axis extends from the medial side of the article of footwear to the lateral side of the article of footwear, and wherein the vertical axis is substantially perpendicular to the medial-lateral axis;
• an upper;
• a sole structure, the sole structure coupled to the upper, and wherein the sole structure further comprises;
• a cushioning element disposed in the heel region, the cushioning element including a first tube and a second tube, wherein each of the first tube and the second tube extends from the lateral side of the article of footwear to the medial side of the article of footwear,
• wherein the first tube includes a first diameter and the second tube includes a second diameter, and the first diameter is different than the second diameter.