Isikhwama somoya esifakwe esitsheni uhlobo lwezinto zokupakisha ezifuthwayo ezisetshenziselwa ukubopha nokuqinisa imithwalo yempahla ezitsheni zokuthutha ngesikhathi sokuthuthwa. Senzelwe ukugcwalisa izikhala noma izikhala ezingenalutho phakathi kwezimpahla esitsheni, ukuvimbela ukuthi zingashintshi noma zihambe ngesikhathi sokuthuthwa.

Lezi zikhwama ngokuvamile zenziwe ngezinto eziqinile nezihlala isikhathi eside njenge-polyethylene noma i-polypropylene, futhi zifakwe i-valve evumela ukuthi zifuthwe kalula ngomoya ocindezelwe. Uma sezifuthwe, zicindezela umthwalo kanye nezindonga zesitsha, okudala umphumela wokunciphisa osiza ekubambeni ukushaqeka nokudlidliza ngesikhathi sokuthutha.

Izikhwama zomoya ezifakwa ezitsheni zivame ukusetshenziswa ezimbonini ezithembele ekuthumeleni izimpahla ezitsheni, njengokuthutha impahla, ukuthunyelwa kwempahla, kanye nokukhiqiza. Zidlala indima ebalulekile ekuqinisekiseni ukuthi izimpahla zifika lapho ziya khona zisesimweni esifanayo nalezo ezazilayishwe kuzo.

Ukusebenzisa izikhwama ze-dunnage kusiza ukuthuthukisa isikhala sezitsha, ukunciphisa ingozi yokulimala kwezimpahla, nokuthuthukisa ukusebenza kahle kokuthunyelwa kwazo zonke. Ziza ngobukhulu obuhlukahlukene kanye nokucushwa ukuze zivumelane nobukhulu nezinhlobo ezahlukene zezitsha.