Sole for a shoe, comprising a.-a semi-finished main body on which the following are defined b.-a main axis (X) which extends from a forefoot region to a hindfoot region , c.-a tread , a vertical axis (Z) that is perpendicular to said tread , and an upper surface that is opposite to said tread along said vertical axis (Z), d.-a seat suitable for receiving an insert , e.-said insert comprising a central portion , f.-said insert comprises a first projection that projects out of said central portion in a direction that is transverse to said vertical axis (Z) when said insert is housed inside said seat , g.- said seat comprising an upper entry hole , produced on said upper surface and shaped so as to allow said insert to pass therethrough and be removably housed inside said seat , and a transverse hole which extends in a direction that is transverse to said vertical axis (Z), closed above by a contact element and shaped so as to contact said first projection when said insert is housed inside said seat in order to prevent said first projection from moving in said transverse hole along said vertical axis (Z), characterized in that h. -said insert comprises a second projection which projects out of said central portion in a direction that is parallel to said vertical axis (Z) and in a direction oriented towards said tread when said insert is housed inside said seat , i. -said seat comprises a lower hole which extends from said upper entry hole towards said tread until it intersects said tread and which is shaped so as to engagingly receive said second projection when said insert is housed inside said seat , l. -wherein said central portion and said second projection extend so as to reinstate said upper surface and said tread , respectively, m. -wherein said insert is made of antistatic material. a.-a semi-finished main body on which the following are defined b.-a main axis (X) which extends from a forefoot region to a hindfoot region , c.-a tread , a vertical axis (Z) that is perpendicular to said tread , and an upper surface that is opposite to said tread along said vertical axis (Z), d.-a seat suitable for receiving an insert , e.-said insert comprising a central portion , f.-said insert comprises a first projection that projects out of said central portion in a direction that is transverse to said vertical axis (Z) when said insert is housed inside said seat , g.- said seat comprising an upper entry hole , produced on said upper surface and shaped so as to allow said insert to pass therethrough and be removably housed inside said seat , and a transverse hole which extends in a direction that is transverse to said vertical axis (Z), closed above by a contact element and shaped so as to contact said first projection when said insert is housed inside said seat in order to prevent said first projection from moving in said transverse hole along said vertical axis (Z), h. -said insert comprises a second projection which projects out of said central portion in a direction that is parallel to said vertical axis (Z) and in a direction oriented towards said tread when said insert is housed inside said seat , i. -said seat comprises a lower hole which extends from said upper entry hole towards said tread until it intersects said tread and which is shaped so as to engagingly receive said second projection when said insert is housed inside said seat , l. -wherein said central portion and said second projection extend so as to reinstate said upper surface and said tread , respectively, m. -wherein said insert is made of antistatic material. <EOS>