Ntupu waya a kpara akpa nwere akwa na oghere ntupu nke ziri ezi, na-eme ka ọ bụrụ usoro nzacha mara mma nke nwere ike ikewa nke ọma na yochaa ihe siri ike na mmiri dị iche iche.
Ngwunye waya nke crimped nwere oghere dị elu nke na-enye ohere ikuku na nnyefe ọkụ, na-eme ka ọ bụrụ ihe dị mma maka ikuku ventilashion, mgbasa ọkụ, na ngwa ndo.