Boot liner

Abstract

A boot liner basically includes a sole portion, an upper portion and a tightening device. A tongue part is preferably mounted in a slit formed in the upper portion. The upper portion has a thermoformable layer with first and second non-thermoformable members located on an inner side and an outer side of the ankle section. The first and second non-thermoformable members are banana-shaped or L-shaped pads that are preferably formed of a polyurethane. The first and second non-thermoformable members are preferably located below and rearwardly the portions of the tibia and fibula that form the ankle of a foot corresponding to the size of the boot liner.

What is claimed is:  
     
         1 . A boot liner comprising: 
 a sole portion; and    an upper portion having a foot section fixedly coupled to said sole portion, an ankle section extending upwardly from said foot section and a leg section extending upwardly from said ankle section, said upper portion including a thermoformable layer located on an inner side and an outer side of said ankle section and a first non-thermoformable member located in one of said inner and outer sides of said ankle section.    
     
     
         2 . The boot liner according to  claim 1 , wherein 
 said first non-thermoformable member is located in said inner side of said ankle section.    
     
     
         3 . The boot liner according to  claim 2 , wherein 
 said first non-thermoformable member is located in said outer side of said ankle section.    
     
     
         4 . The boot liner according to  claim 3 , wherein 
 said upper portion includes a second non-thermoformable member located in said inner side of said ankle section.    
     
     
         5 . The boot liner according to  claim 4 , wherein 
 said first a nd second non-thermoformable members are banana-shaped pads.    
     
     
         6 . The boot liner according to  claim 5 , wherein 
 said first and second non-thermoformable members are formed of a polyurethane.    
     
     
         7 . The boot liner according to  claim 5 , wherein 
 each of said first and second non-thermoformable members has a height of approximately 70 millimeters and a length of approximately 70 millimeters.    
     
     
         8 . The boot liner according to  claim 7 , wherein 
 said upper portion includes a tightening device with a first strap portion overlying a part of said first non-thermoformable member and a second strap portion overlying a part of said second non-thermoformable member.    
     
     
         9 . The boot liner according to  claim 1 , wherein 
 said thermoformable layer further extends along said foot section.    
     
     
         10 . The boot liner according to  claim 9 , wherein 
 said thermoformable layer further extends along and a leg section    
     
     
         11 . The boot liner according to  claim 10 , wherein 
 said upper portion includes a foam layer overly an exteriorly facing surface of said thermoformable layer.    
     
     
         12 . The boot liner according to  claim 11 , wherein 
 said upper portion includes an outer layer overly an exteriorly facing surface of said thermoformable layer.    
     
     
         13 . The boot liner according to  claim 1 , wherein 
 said upper portion includes an inner layer overly an interiorly facing surface of said thermoformable layer with said first and second non-thermoformable members located between said thermoformable layer and said inner layer.    
     
     
         14 . The boot liner according to  claim 1 , wherein 
 said first non-thermoformable member is a banana-shaped pad.    
     
     
         15 . The boot liner according to  claim 1 , wherein 
 said first and non-thermoformable member is formed of a polyurethane.    
     
     
         16 . The boot liner according to  claim 1 , wherein 
 said first non-thermoformable member has a height of approximately 70 millimeters and a length of approximately 70 millimeters.    
     
     
         17 . The boot liner according to  claim 1 , wherein 
 said sole portion is a separate member that is coupled to said foot section of said upper portion.    
     
     
         18 . The boot liner according to  claim 17 , wherein 
 said sole portion is constructed of flexible materials.    
     
     
         19 . The boot liner according to  claim 1 , wherein 
 said sole portion includes an outer sole section that is fixedly coupled to said foot section of said upper portion.    
     
     
         20 . The boot liner according to  claim 19 , wherein 
 said outer sole section of said sole portion includes an exterior layer of a polyvinyl chloride material.    
     
     
         21 . The boot liner according to  claim 20 , wherein 
 said outer sole section of said sole portion further includes an interior thermoformable layer.    
     
     
         22 . The boot liner according to  claim 21 , wherein 
 said sole portion further includes an inner sole section that overlies said outer sole section of said sole portion.    
     
     
         23 . The boot liner according to  claim 1 , wherein 
 said sole portion further includes an thermoformable layer.    
     
     
         24 . The boot liner according to  claim 1 , wherein 
 said upper portion includes a tongue portion coupled to said upper portion and arranged to span a longitudinal slit formed in said leg section, and a tightening device coupled to said upper portion for drawing opposite lateral sides of said upper portion that define said slit towards one another.    
     
     
         25 . The boot liner according to  claim 19 , wherein 
 said tightening device includes a first strap portion overlying a part of said first non-thermoformable member and a second strap portion overlying a part of said second non-thermoformable member.