Shoe sole having a resilient insert

A shoe sole, comprising:

• a midsole formed from a first elastomeric material, said midsole having a top surface, a bottom surface, and a side wall which define a first thickness;
• an outsole having a top surface, a bottom surface, and a side wall which define a second thickness;
• and
• a resilient insert formed from a second elastomeric material and disposed between said bottom surface of said midsole and said top surface of said outsole,
• wherein said second elastomeric material enables said resilient insert to recover at a rate similar to the rate of recovery of said midsole, to permit said resilient insert and said midsole to absorb and recover from impact forces applied to the shoe sole at substantially equal rates.

A shoe sole, comprising:

• a resilient insert comprising a top surface, a bottom surface, and a side wall which extends between said top surface and said bottom surface;
• an outsole;
• and
• a midsole having a top surface, a bottom surface, and a side wall which define a thickness, said midsole further comprising a cavity defined within said bottom surface of said midsole, said cavity having a top surface and a peripheral wall;
• wherein said cavity of said midsole receives said resilient insert such that said side wall of said resilient insert is arranged substantially flush against said peripheral wall of said cavity to prevent the formation of gaps between said cavity and said resilient insert to reduce the production of friction and related noise.

A shoe sole, comprising:

• a resilient insert comprising a top surface, a bottom surface, and a side wall which extends between said top surface and said bottom surface, and a first volume;
• an outsole;
• and
• a midsole having a top surface, a bottom surface, and a side wall which define a thickness, said midsole further comprising a cavity defined within said bottom surface of said midsole, said cavity having a top surface, a peripheral wall and a second volume;
• wherein said first volume of said resilient insert is greater than said second volume of said cavity, such that said first volume of said resilient insert is not fully accommodated by said second volume of said cavity, and when said cavity of said midsole receives said resilient insert, said side wall of said resilient insert is arranged substantially flush against said peripheral wall of said cavity to prevent the formation of gaps between said cavity and said resilient insert to reduce the production of friction and related noise.