Ihe TPU bụ thermoplastic polyurethane, nke nwere ike kewaa polyester na polyether. Ihe nkiri TPU nwere njirimara magburu onwe ya nke nnukwu esemokwu, ịdị elu dị elu, nkwụsị elu dị elu na nkwụsị ịka nká, ma nwee àgwà magburu onwe ya nke nchebe gburugburu ebe obibi, ihe na-adịghị egbu egbu, ihe àmà mildew na antibacterial, biocompatibility, wdg.