Cold adhesion is not waterproof because it is glued and easy to degum; Moreover, because the injection molding adopts PU raw materials, the material is uniform and can be molded at one time, so the quality is better. Injection shoes are made of PU material, which is uniform in material, corrosion-resistant, non-adhesion between soles and uppers, fracture-proof outsole, wear-resistant, waterproof, low-carbon and environmentally friendly.