Ndi chitukuko cha chuma, anthu amakono akukula mofulumira ndipo anthu ambiri ali ndi masomphenya awo apadera a mafashoni.Mwachitsanzo, tsopano zovala zambiri ndi suti zamasewera zimagwiritsidwa ntchito mtundu wopepuka wa nsalu yopyapyala yowunikira.Ojambula, oimba, ndi ochita zisudzo akugwiritsa ntchito kwambiri zinthu zowunikira pazovala zawo zamafashoni.Mitundu yowoneka bwino ya zovala si mafashoni okha, komanso usana ndi usiku zidzatulutsa zowoneka bwino, motero zatenga gawo lofunikira pakuteteza chitetezo.

Nsalu yonyezimira imatha kugawidwa m'mitundu iwiri, yomwe ili mwachikhalidwe cha nsalu yonyezimira, ina ndi nsalu yonyezimira yosindikizira, nsalu yonyezimira imatchedwanso crystal lattice, ndi mtundu watsopano wa zinthu zonyezimira zimatha kusindikiza.Nsalu yonyezimira imatha kugawidwa molingana ndi zinthu zosiyanasiyana: nsalu yonyezimira yonyezimira, nsalu yonyezimira ya TC, nsalu yonyezimira yambali imodzi, nsalu yonyezimira yokhala ndi mbali ziwiri ndi zina zotero.