Patent ID: 8893407

Claim:
An article of footwear comprising: a shell including a sole and a wall, the wall being constructed and arranged to extend upwardly relative to the sole to cover at least a part of a foot or lower leg of a wearer; said wall of the shell comprising: at least one portion comprising less than an entirety of the wall of the shell, said portion comprising: a mixture of a base material and an additive; said base material of the mixture comprising a thermoplastic material providing rigidity to said one portion of the wall of the shell; said thermoplastic material having a melting temperature greater than 170° C.; said additive of the mixture having a melting temperature lower than 100° C.; said additive of the mixture constituting a proportion of the portion of the wall of the shell between 3% and 45%; a foundation comprising: neither said at least one portion of the wall of the shell nor said additive; a foundation base material comprising: a thermoplastic material providing rigidity to the wall of the foundation; the thermoplastic material of the foundation having a melting temperature greater than 170° C.