Lezi zilwane zesethikliki ziyinithuluzi yesethikliki i-synthetic polymer ezekelwe ngokukhethekile ukukhona kummubhalo womhlaba nokamaphanyana, okuhlinzeka nokuphakamisa, ukuningiliza, ukusikela, nokubetela amanzi eyisinqumo ebalulekile enkusheni ye-geotechnical. Izilwane ze-geotextiles ziyinithuluzi evumela okunsuka kwamanzi, okuncane ngokusele enziwe nge-polypropylene noma i-polyester fibers ngendlela ye-woven, non-woven, noma i-knitted, kuyimbi izilwane ze-geomembranes ziyinithuluzi evumelani nokunsuka kwamanzi noma eliphansi, enziwe nge-polyethylene, i-polypropylene, i-PVC, noma i-composite materials. Zombi izigaba zemithamo zisebenza njengezinto eziyisinqumo ezemisebenzi zisekelo zokuju, emisebenzi yophucula umhlaba, kanye nezeskelathu esengaphansi lapho i-soil mechanics nokuthubela amanzi kubube insinindatelo.
I-geotextiles izinambuzane zokusikwa ngumgqa ezenziwe ngo-polymers esinqoseni ezinjengale-polypropylene, i-polyester, noma i-polyethylene, ezakhelwe ukuqalisa imisebenzi emincane esolwazini lokusikwa umhlaba, ikhokheli, nokuvikela ukwesekela. Lezi zithwali zokwenza umoya yelangeni zenziwe ngokuphambene noma zingaphambeki zokukela, okukwazi ukweza izinto ezikhethekile ze-permeability, amandla okukuqala, nokumelandela izimpembelelo. Emusanomzaneni omncane okusikwa nokwesekela kwomhlaba, i-geotextiles eza njengamingxenyana emincane ekusetshenzisweni ethululekile umhlaba, amanzi, nokukuqala okusekelwe ukutha isivumelwano sesisekelo nesenso.
I-geomembranes izingozi ezilinganiselwe, izinambuzane ezilolisa zenziwe ngo-polymer materials, ikakhulukazi i-polyethylene enamba ephakeme (HDPE), i-polyethylene enamba ephansi (LDPE), i-polypropylene (PP), i-polyvinyl chloride (PVC), noma izinambuzane ezikhethekile ezikuseni. Lezi zishidi zokusikwa amandla noma ezikhethekile zokusikwa amandla zisebenza njengamathela okuvikela amandla amanzi, okuvimbela uko-migration kwekhambi ngaphakathi kwelwazi kanye nelanga. I-geomembranes emodeni ihloswe ukumelana nomnyakazo womsebenzi, ukunyonya kwezakhambi, nokubhukuqwa kokukhwele kokuqasela okwenza ukuqinisekisa ukulungisela umbuzo emusanomzaneni omncane okusebenzisa amandla.