EVA: Vinyl acetate copolymer, Chinese plastic mesh, polymer material. Eva is a kind of foam base material, which will become hard and flat after a long time. The rubber will not be, and it is more wear-resistant. It is commonly used in the midsole of jogging, walking, casual shoes, and foot training shoes.

Disadvantages: Easy to absorb water, not easy to corrode, environmentally friendly, and easily dirty.

Advantages: Light weight, good elasticity, good flexibility, not easy to wrinkle, good color rendering, suitable for various climates.

PU: High molecular polyurethane synthetic material, commonly used in the midsole of basketball and tennis shoes, and can also be directly used as the outsole of casual shoes.

Advantages: High density, high hardness, wear resistance, good elasticity, good oxidation resistance, easy corrosion, good environmental protection, and less wrinkling.

Disadvantages: Strong water absorption, easy to turn yellow, easy to break, poor elongation, not resistant to water, and easy to rot at the bottom.

The most common type of PVC is slippers worn in summer, but the ones that are hard in winter are PVC. When the plasticizer inside is used for a long time and overflows, it will crack. He has the highest mass and density. This is the cheapest.

EVA has a low density and is a thermoplastic elastomer composed of ethylene (E) and vinyl acetate (VA). Summer is as soft and lightweight as winter. The higher the content of vinyl acetate (VA content), the higher its transparency, softness, and toughness.