Stratified insole for the internal ventilation and control of the microclimate of a shoe

Stratified insole for a shoe of the type comprising a sole, if necessary provided with holes intercommunicating with the interior of the shoe, in correspondence with an interior side to which a ventilated stratified insole is joined that is comprised of at least one layer of thermoplastic material whose upper interface is shaped with a plurality of channels and is positioned above a layer of transpiring material to support the sole of the foot;

• said insole being peripherally shaped according to the shape of the sole of the foot, said insole comprising:
• a first lower support layer comprised of transpiring material;
• a second layer, superimposed on said first lower support layer, comprised of insulating material, which provides a plurality of channels in correspondence to the upper interface;
• a third layer superimposed on said second layer, comprised of insulating material, which provides, in correspondence with the upper interface, a plurality of channels that at least partly coincide with the channels obtained along the second layer, said channels being in intercommunication with the channels of the second and underlying layer;
• and
• a fourth layer of material joined to said third layer, comprised of transpiring material.