Insole with improved internal air circulation

Abstract

An insole with improved internal air circulation is provided, including a cover layer and a main body, where the cover layer is a thin membrane made of leather skin, cloth, microfiber fabric, or composite material, and the main body is made from foam rubber, thermoplastic rubber, or flexible foam plastic. The body of the insole is provided with mixed pattern of channels and nodes on the surface, and a plurality of air vents evenly distributed on the bottom surface corresponding to the recessed areas of the channels and nodes, so that the air is able to circulate under the feet to help reduce heat and moisture accumulation in the wearer's shoes.

1 . An insole comprising: 
 a cover layer having a plurality of air vents on the top surface; and    a main body being embedded with mixed pattern of channels and nodes, and a plurality of air vents evenly distributed on the bottom surface which correspond to the recessed areas of the channels and nodes.    
   
   
       2 . The insole as claimed in  claim 1 , wherein the cover layer is a thin membrane made of leather skin, cloth, microfiber fabric, or composite material containing charcoal-based nanoparticles.  
   
   
       3 . The insole as claimed in  claim 1 , wherein the main body of the insole is made of foam rubber, thermoplastic rubber (TPR), or flexible foam plastic.  
   
   
       4 . The insole as claimed in  claim 1 , wherein the composite materials for making the body of the insole contains two or more kinds of materials including foam rubber, thermoplastic rubber (TPR) and flexible foam plastic.  
   
   
       5 . The insole as claimed in  claim 1 , wherein a major portion of the channels extend in parallel from the sole to the heel, and after turning around the heel the channels skew to the edge on one of the two sides similar to the pattern of a tree.  
   
   
       6 . The insole as claimed in  claim 1 , wherein a minor portion of the channels surrounding the large node expand outward in concentric circles and cross over other channels in their paths.  
   
   
       7 . The insole as claimed in  claim 1 , wherein the pattern of nodes is comprised of an array of smaller nodes and a large node, where the smaller nodes are arranged close to the inner edge of the insole, and the large node is located below the smaller nodes corresponding to the ball of the foot, while all nodes are respectively connected with the channels.