The shoe insole is quite complex and, in a broad sense, can include an outsole, midsole and heel, all of which are used to make up the sole.In narrow sense, it only refers to the outsole, it generally shoe insole material should possess the characteristics of common wear-resistant, water resistant, oil resistant, heat resistant, compression, impact resistance, good elasticity, easy for foot type, after finalize the design is not easy to distort, thermal insulation, easy to absorb moisture, etc.,