Pu is better, pu is polyurethane, eva is polystyrene PVC, and the most common slippers are summer slippers, but PVC is harder in winter. The plasticizer inside will crack if it overflows for a long time. He has the greatest mass and density. This kind is the cheapest. EVA is a thermoplastic elastomer pu: a low-density polymer polyurethane synthetic material. Commonly used in the midsole of basketball and tennis shoes, and can also be directly used in the outsole of casual shoes. Advantages: high density, high hardness, wear resistance, good elasticity, good oxidation resistance, easy corrosion, good environmental protection and not easy to wrinkle. Disadvantages: strong water absorption, easy yellowing, easy breaking, poor elongation, poor water resistance and easy bottom rot.

Eva: vinyl acetate * * * polymer, China plastic net, polymer material. Eva is a kind of foam substrate, which will harden and flatten after a long time, but rubber will not. More wear-resistant, often used for jogging, walking, casual shoes, foot training shoes at the bottom. Advantages: light weight, good elasticity, good flexibility, not easy to wrinkle, good color rendering, suitable for all kinds of climates. Disadvantages: easy to absorb water, not easy to corrode, environmentally friendly and easy to get dirty.