Isikhumba se-PU, okanye i-polyurethane yesikhumba, sithwathwa esenziwe nge-thermoplastic polymer esetyenziselwa ukwenza ifenitshala okanye izihlangu.I-100% yesikhumba ye-PU yenziwe ngokupheleleyo kwaye ithathwa njenge-vegan.Kukho ezinye iindidi ze-PU zesikhumba ezibizwa ngokuba yi-bicast yesikhumba esinesikhumba sokwenyani kodwa sine-polyurethane yokwambathisa ngaphezulu.Olu hlobo lwesikhumba lwe-PU luthatha inxalenye ye-fibrous yesikhumba senkomo eshiyekileyo ekwenzeni isikhumba sangempela kwaye ibeke i-polyurethane phezu kwayo.Nangona kunjalo, i-PU yesikhumba iye yathandwa kakhulu kwiminyaka engama-20-30 edlulileyo kwifenitshala, iibhatyi, izikhwama, izihlangu, njl.