Patent ID: 8578630

Claim:
A shoe sole comprising: (a) a base for attachment to a bottom of a shoe, and (b) a plurality of protrusions projecting from the base and integrally constructed with the base, wherein each of the plurality of protrusions comprises: (i) an angled side extending at an approximate thirty-degree angle from the base, and (ii) a perpendicular side extending at a near perpendicular angle from the base, wherein the angled side of each of the plurality of protrusions further comprises a first connecting edge adjacent to and extending along the base and a first terminal edge at the opposing edge of the angled side from the first connecting edge; wherein the perpendicular side further comprises a second connecting edge adjacent to and extending along the base and a second terminal edge at the opposing edge of the perpendicular side from the second connecting edge; wherein the shoe sole extends in a substantially planar fashion in an as-worn position on a foot having an inner side, an outer side, a ball, and a heel, wherein in the as-worn position, the sole comprises: (i) an inner side positioned beneath the inner side of the foot in an as-worn position; and (ii) an outer side positioned beneath the outer side of the foot in an as-worn position; (iii) a ball portion positioned beneath the ball of the foot in an as-worn position; and (iv) a heel portion positioned beneath the heel of the foot in an as-worn position; and wherein the plurality of protrusions further comprises, at the ball portion of the sole, concentrically arranged shapes formed by the surface-facing sides, wherein the first terminal edge and the second terminal edge are positioned closer together at the inner side than at the outer side, whereby the surface-facing side at the inner side is narrower than at the outer side.