Article of footwear with ribbed outsole and notched midsole

1. A sole for an article of footwear, the sole comprising:

an outsole comprising longitudinal ribs arranged on a top surface of the outsole, wherein each of the longitudinal ribs comprises a top surface that is curved; and

a midsole disposed above the outsole and defining notches in a bottom surface of the midsole,

wherein the longitudinal ribs are disposed in the notches;

wherein the sole comprises a forefoot region, a midfoot region, and a rearfoot region, and wherein the longitudinal ribs are disposed in a forefoot region of the sole and no longitudinal ribs are disposed rearward of the forefoot region.

2. The sole of claim 1 , wherein the longitudinal ribs comprises five longitudinal ribs arranged to be disposed under metatarsophalangeal joints of a foot.

3. The sole of claim 1 , wherein the longitudinal ribs have an equal length to each other.

4. The sole of claim 1 , wherein at least one of the longitudinal ribs has a length different than another longitudinal rib of the logitudinal ribs.

5. The sole of claim 1 , wherein the longitudinal ribs are configured to facilitate forward motion of a foot of a wearer.

6. An article of footwear comprising:

an upper;

a midsole coupled to the upper and defining notches in a bottom surface of the midsole; and

an outsole coupled to the midsole and comprising longitudinal ribs extending from a top surface of the outsole, wherein each of the longitudinal ribs comprises a top surface that is curved such that the top surface slopes from a maximum height at a center of the longitudinal rib towards the top surface of the outsole at ends of the longitudinal rib, and wherein each longitudinal rib is disposed in one of the notches of the midsole;

wherein the longitudinal ribs are disposed in a forefoot region of the article of footwear and no longitudinal ribs are disposed rearward of the forefoot region.

7. The article of footwear of claim 6 , wherein the notches are not interconnected.

8. The article of footwear of claim 6 , wherein a bottom surface of the outsole does not define any notches located opposite the longitudinal ribs.

9. The article of footwear of claim 6 , wherein a top surface of the midsole does not have any longitudinal ribs located opposite the notches.

10. A sole for an article of footwear, the sole comprising:

an outsole comprising a plurality of longitudinal ribs on a top surface of the outsole, wherein the outsole comprises a forefoot region, a midfoot region, and a rearfoot region, and wherein each of the plurality of longitudinal ribs are arranged at the forefoot region of the outsole and no longitudinal ribs are arranged rearward of the forefoot region; and

a midsole defining notches configured to complementarily fit over the plurality of longitudinal ribs.

11. The sole of claim 10 , wherein the sole is configured to promote a quicker transition to a forefoot of the sole during a gait cycle of a wearer.

12. The sole of claim 10 , wherein the plurality of longitudinal ribs disposed in the notches stiffen the sole.

13. The sole of claim 10 , wherein the outsole defines a pattern of holes extending through the outsole.

14. The sole of claim 13 , wherein the pattern of holes are disposed between the plurality of longitudinal ribs.

15. The sole of claim 10 , wherein a longitudinal rib of the plurality of longitudinal ribs is disposed under a metatarsophalangeal joint of a foot of a wearer.