Isakhiwo esikhethekile esinezinhlangothi ezintathu sensimbi yegwebu siyenza ibe nezakhiwo eziningi ezinhle kakhulu ezehlukile ezintweni zendabuko, njenge:

1. i-porosity ephezulu: i-porosity ingafinyelela ngaphezu kwe-98% yesakhiwo esicishe singene ngokugcwele, njengento yokuhlunga, ukwehla kwengcindezi encane, izinga lokugeleza okuphezulu, ukuvuthwa okuhle kakhulu.
2. indawo enkulu ethize: ene-porosity efanayo, inendawo enkulu kakhulu ethize uma iqhathaniswa nezinye izinto ezimbobombobo, kufika kumitha yesikwele esisodwa ngegremu noma ngaphezulu.
3. i-porosity ephezulu kanye nesakhiwo se-pore esifanayo: i-porosity ingaphezu kuka-95%, isakhiwo esinezimbotshana ezintathu-ntathu futhi esikwazi ukungena, futhi sinamandla amahle ensimbi, ivolumu efanayo, isisindo silula, futhi sinamandla aphezulu, futhi inokumuncwa okuhle komsindo, ukumunca amandla, izakhiwo zokuvikela i-electromagnetic.
4. inezakhiwo zensimbi: insimbi yegwebu ingenziwa nge-nickel, ithusi, insimbi, noma izinto ze-alloy, ama-substrates ahlukene anezakhiwo zensimbi ezihlukene, ezifana ne-fire, non-toxic, akukho zinsalela eziwayo, ezivuselelwa kabusha, ezishisayo, njll., anhlobonhlobo izicelo.
5. ingashiselwa, igundwe, icindezelwe izacile, igoqwe nokunye ukucutshungulwa komshini, kuyilapho impahla yensimbi ingabuyekezwa kabusha, ehambisana nokuvikelwa kwemvelo kanye nokonga kwezindleko ngesikhathi esifanayo.