Esikushoyo ukuphefumula kukhomba ekuphefumuleni kwendwangu ye-laminated membrane.Indwangu ayinamanzi futhi iphefumula isetshenziswa kabanzi endaweni yangaphandle.
Ukuphefumula izinga indwangu evumela ngalo umoya nomswakama ukuba kudlule kuyo.Ukushisa nomswakama kunganqwabelana endaweni ezungezile encane ngaphakathi kwesambatho esiseduze sendwangu ephefumulayo empofu.Izici zokuhwamuka kwezinto zithonya izinga lokushisa futhi ukudluliswa komswakama okuhle kunganciphisa ukuzwa okushisayo kokuba manzi.Ucwaningo luye lwabonisa ukuthi umbono wezilinganiso zokungakhululeki uhlotshaniswa kakhulu nokwenyuka kwezinga lokushisa lesikhumba nezinga lokujuluka.kuyilapho umbono oqondile wokunethezeka ezingutsheni uhlobene nokunethezeka okushisayo.Ukugqoka izingubo ezisondelene ezenziwe ngezinto ezidlulisa ukushisa okungekuhle kubangela ukungakhululeki, nokwanda kokuzwa ukufudumala nokujuluka okungase kubangele ukonakala ekusebenzeni komuntu oyifakile .Ngakho-ke ukuphefumula okungcono kusho ikhwalithi ye-membrane engcono.
