★ Izinto ze-polymer, ingcindezi yokulwa ne-negative, ukuguquguquka okuhle;
★ Uhla olujwayelekile lokuxhuma, lungafanela izinhlobo ezahlukene zamamodeli ukuze kube lula ukusetshenziswa kwezokwelapha;
★ Ukuhlinzekwa okungenamagciwane, ukusetshenziswa okulahlayo, ukugwema ukutheleleka okuthelelanayo;
★ Ayina-latex, ishibhile.