Ulusi wa sliver wadziwika kwambiri zaka ziwiri zapitazi.Chinthu chachikulu ndi chakuti pansi pa ntchito ya kuwala, pali mtundu wamatsenga wamatsenga, womwe ndi wokongola kwambiri.Njira yaikulu ndiyo kugwiritsa ntchito waya wa golidi kapena siliva m’malo mwa mawaya angapo a nayiloni poluka ndipo pomalizira pake amalukira munsalu ya mauna.Amagwiritsidwa ntchito makamaka munsalu zipewa, maukonde aukwati, ndi zolumikizira magalasi.Itha kugwiritsidwanso ntchito pazokongoletsa zosiyanasiyana zapakhomo.Ndi nsalu yokhala ndi ntchito zambiri.Ili ndi mawonekedwe amitundu yowala, osafota, odana ndi ukalamba, mphamvu yayikulu, kubweza mwachangu, komanso kupuma.