Izinto ze-TPU yi-thermoplastic polyurethane, enokuthi yohlulwe ibe yi-polyester kunye ne-polyether. Ifilimu ye-TPU ineempawu ezibalaseleyo zoxinzelelo oluphezulu, ukuqina okuphezulu, ukumelana nokunxiba okuphezulu kunye nokumelana nokuguga, kwaye ineempawu ezibalaseleyo zokukhuselwa kwendalo, okungeyotyhefu, ubungqina bokungunda kunye ne-antibacterial, biocompatibility, njl.