How about rubber foam soles? Compared with rubber soles

Rubber foam bottom is a bedding fabric made of rubber closed-cell or open-cell foam material made of natural or artificial rubber. Half a century ago, this material was widely used in sports shoes, sports shoes, travel shoes, liberation shoes, casual shoes and so on.

Polyurethane (PU) is a kind of polymer with repeating structural units of urethane segments, which is prepared by the reaction of isocyanate and polyol. Compared with ordinary rubber soles, polyurethane soles have the characteristics of light weight and good wear resistance. Polyurethane soles are mainly made of polyurethane resin, which solves the problems that plastic soles and recycled rubber soles are easy to break and rubber soles are easy to open.