Isakhiwo sangaphakathi se-microfiber polyurethane yesikhumba sokwenziwa sisondele kwisikhumba sendalo, kwaye umbala ucace ngakumbi kunesikhumba sendalo, sinikezela ngemibala emininzi kubathengi ukuba bakhethe ukuhlobisa kwangaphakathi kwemoto, unokwenza indawo oyithandayo yangaphakathi.