Itoti yenkunkuma yangaphandle ingenziwa ngokwezifiso ngobukhulu, umbala kwaye iprintwe ngelogo kunye nombhalo ngokweemfuno.
Isango lokufaka inkunkuma yangaphandle lisebenzisa uyilo lomphetho okhuselayo ngaphandle kweekona ezibukhali kunye neebharrs, okuthintela izandla ukuba zingalimali xa kukhutshwa inkunkuma; ezinye iimodeli zangaphandle zixhotyiswe ngezixhobo zokufakela emhlabeni kunye nezihluthulelo, ezenza ukufakwa kube zinzile kwaye kuthintele ubusela.
Umphezulu wesinyithi wentonga yenkunkuma yangaphandle ugudile, akulula ukuwufaka ibala kwaye awumelani nokugqwala.
Umphezulu womthi wentonga yenkunkuma yangaphandle unyangwa ngokhuseleko, ngoko ke akulula ukuba amabala angene, kwaye ukugcinwa kwemihla ngemihla kulula; ezinye zazo zixhotyiswe nge-inner liner eyenziwe ngentsimbi eqinisiweyo, elungele ukuqokelelwa nokukhutshelwa kwenkunkuma kunye nokucoca nokutshintshwa kwe-inner liner.