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1. A mid-sole, or insole for shoes, comprising: a body having an upper surface configured to be oriented towards the sole of a foot and a lower surface configured to be oriented away from the sole of the foot, said upper surface having a plantar perimetric shape, wherein from said lower surface of said body a first plurality and a second plurality of protrusions protrude downward wherein the protrusions protrude at varying distances such that the mid-sole has a continually varying thickness and each one of the first and second plurality of protrusions has an axial cavity, wherein first holes are disposed at said upper surface of said body, at each protrusion of said first and second plurality of protrusions, wherein said first plurality of protrusions have a first group of first holes disposed at a heel region and a forefoot region, and a second group of first holes disposed at areas other than said heel region and said forefoot region, wherein each first hole of said first group having a first diameter and each first hole of said second group having a second diameter smaller than said first diameter, wherein said first plurality of protrusions have first apices and said second plurality of protrusions have second apices, wherein said first plurality of protrusions are frustum-shaped and said second plurality of protrusions are each a single cylinder, each of said first and second apices of said first and second plurality of protrusions having a curved surface, such that the curved surfaces of said first and second apices of said first and second plurality of protrusions conform along a curved plane, wherein the body is anatomically varied.
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