Nsalu yopangidwa ndi chikopa cha pansi / PVC sheet nthawi zambiri imapangidwa ndi ulusi wa polyester (PET) kapena polypropylene (PP), ndipo kulemera kwake nthawi zambiri kumakhala pakati pa 40 ndi 100g/㎡. Zogulitsa zolemera pang'ono zimakhala zopyapyala ndipo zimakhala ndi kusinthasintha kwabwino, zomwe zimapangitsa kuti zikhale zoyenera kuyikidwa pansi movutikira. Zogulitsa zolemera kwambiri zimakhala zolimba mokwanira komanso zolimba kwambiri, zomwe zimapangitsa kuti zikhale zoyenera kugwiritsidwa ntchito pazinthu zolemera komanso zogwiritsidwa ntchito kwambiri. Mtundu, mawonekedwe ndi zinthu zimatha kusinthidwa.
