Sole and shoe

A sole comprising:

• a sole body;
• an elastic portion formed of an elastic body and disposed adjacent to the sole body;
• a surrounding member that surrounds the elastic portion, the surrounding member being made of a material higher in elastic modulus than a material forming the elastic portion;
• and
• a pressing member fixed to the surrounding member in a state in which the pressing member presses the elastic portion in a thickness direction of the sole body;
• wherein a tensile rigidity of the surrounding member in the thickness direction is higher than a compression rigidity of the elastic portion in the thickness direction and higher than a compression rigidity of the surrounding member in the thickness direction, direction;
• wherein an uncompressed thickness denotes a thickness of the elastic portion in an uncompressed state in which a compressive load including pressing force applied by the pressing member does not act on the elastic portion, an initial thickness denotes a thickness of the surrounding member in an initial state in which a load in the thickness direction does not act on the surrounding member, and the uncompressed thickness is larger than the initial thickness, thickness;
• wherein a reference thickness denotes a thickness of the elastic portion and the surrounding member in a state in which the elastic portion receives the pressing force applied by the pressing member and the surrounding member receives a tensile load from the pressing member such that a top surface of the elastic portion is flush with a top surface of the surrounding member and in an unloaded state in which a load from a wearer does not act on the elastic portion and the surrounding member, and the reference thickness is smaller than the uncompressed thickness of the elastic portion and larger than the initial thickness of the surrounding member;
• and
• wherein the surrounding member includes:
• a first frame portion formed in a frame shape;
• a second frame portion formed in a frame shape and disposed below the first frame portion;
• and
• a plurality of coupling portions that couple the first frame portion to the second frame portion;
• wherein at least two coupling portions of the plurality of coupling portions and the first frame portion are connected at a first connecting portion, and a plurality of the first connecting portions are arranged at intervals in a circumferential direction of the first frame portion;
• and
• wherein at least two coupling portions of the plurality of coupling portions and the second frame portion are connected at a second connecting portion, and a plurality of the second connecting portions are arranged at intervals in a circumferential direction of the second frame portion.