Shoe sole

1. A shoe sole comprising:

a first sole layer including a first region having a first rigidity, and a second region having a second rigidity that is more flexible than the first rigidity and extending in a longitudinal direction of the shoe sole, the first sole layer having an inner side edge and an outer side edge; wherein

the second region is spaced from a toe edge of the first sole layer and is spaced from a heel edge of the first sole layer, the inner and outer side edges extending between the toe edge and the heel edge to define a periphery of the first shoe layer,

the first sole layer has a cleat engagement part, the cleat engagement part having at least two attachment openings, the at least two attachment openings including a toe end and a heel end, and

the second region is located between the cleat engagement part and one of the inner and outer side edges of the first sole layer, the second region includes at least one through opening, the at least one through opening being disposed adjacent to the cleat engagement part and at least one of the inner and outer side edges, the at least one through opening having a toe opening end and a heel opening end, the toe end and the heel end of the at least two attachment openings overlapping the at least one through opening in a lateral direction of the shoe sole that is perpendicular to the longitudinal direction.

2. The shoe sole according to claim 1 , wherein

the at least one through opening of the second region includes at least one elongated through opening.

3. The shoe sole according to claim 1 , wherein

the second region extends to a stepping part of the shoe sole in the longitudinal direction of the shoe sole, the stepping part having a contact surface that contacts a ball of a wearer's foot when the shoe sole is being worn.

4. The shoe sole according to claim 1 , wherein

the first sole layer is disposed adjacent to an upper of a shoe in a state where the shoe sole is coupled to the upper.

5. The shoe sole according to claim 1 , wherein

the second region includes a first part and a second part, the first part is located on an inner instep side of the cleat engagement part, the second part is located on an outer instep side of the cleat engagement part.

6. The shoe sole according to claim 5 , wherein

the second part is longer than the first part.

7. The shoe sole according to claim 5 , wherein

the first part includes a first elongated through opening, and

the second part includes a second elongated through opening that is longer than the first elongated through opening.

8. The shoe sole according to claim 5 , further comprising

a second sole layer at least partly overlapping the first sole layer, the second sole layer having a third rigidity that is more flexible than the first rigidity.

9. The shoe sole according to claim 8 , wherein

the first sole layer is disposed closer to a top of the shoe sole than the second sole layer in a state where shoe sole is assembled.

10. The shoe sole according to claim 8 , further comprising

a third sole layer having an outer foot shape, and having a fourth rigidity that is less rigid than the first rigidity.

11. The shoe sole according to claim 10 , wherein

the second sole layer is disposed between the first sole layer and the third sole layer.

12. The shoe sole according to claim 10 , wherein

the third sole layer includes reduced thickness areas at least partially covering the first part and the second part.

13. The shoe sole according to claim 11 , wherein

each of the first part and the second part includes at least one elongated through opening, and

the third sole layer includes at least one opening aligned with the at least one elongated through opening of each of the first part and the second part.

14. The shoe sole according to claim 13 , wherein

the first part includes a first elongated through opening,

the second part includes a second elongated through opening,

the first part further includes a third elongated through opening,

the second part further includes a fourth elongated through opening.

15. The shoe sole according to claim 1 wherein

the cleat engagement part includes at least two attachment openings.

16. The shoe sole according to claim 1 , further comprising

a second sole layer at least partly overlapping the first sole layer, wherein

the first sole layer has a first flexibility, and

the second sole layer has a second flexibility that is more flexible than the first flexibility.

17. The shoe sole according to claim 1 , further comprising

a second sole layer at least partly overlapping the first sole layer, wherein

the first sole layer includes a first material, and

the second sole layer includes a second material different from the first material.

18. The shoe sole according to claim 17 , wherein

the first material includes a plastic material.

19. The shoe sole according to claim 17 , wherein

the second material includes an elastic material.

20. A shoe comprising the shoe sole according to claim 1 , further comprising

an upper attached to the shoe sole.

21. A shoe sole comprising:

a first sole layer including a first region having a first rigidity, and a second region having a second rigidity that is more flexible than the first rigidity and extending in a longitudinal direction of the shoe sole, the first sole layer having an inner side edge and an outer side edge; wherein

the second region is spaced from a toe edge of the first sole layer and is spaced from a heel edge of the first sole layer, inner and outer side edges extending between the toe edge and the heel edge to define a periphery of the first shoe layer,

the first sole layer has a cleat engagement part, the cleat engagement part having at least two attachment openings, the at least two attachment openings including a toe end and a heel end, the first sole layer further having at least one through opening disposed adjacent to the cleat engagement part and at least one of the inner and outer side edges, the toe end and the heel end of the at least two attachment openings overlapping the at least one through opening in a lateral direction of the shoe sole that is perpendicular to the longitudinal direction.