Yawan zaren ulu yawanci ana jujjuya shi daga ulu, amma akwai kuma zaren da aka yi daga nau'ikan kayan fiber na sinadarai, kamar fiber acrylic, fiber polyester, da fiber Persian. Kodayake akwai nau'ikan yaren ulu da yawa, ana iya raba su zuwa manyan rukuni guda hudu: ulu yar, ulu ulu yarn da takamaiman saƙa ulu yarn.
Nau'in yarn don samfuran tufafin ulu kamar haka
1. Zaren ulu mai ƙaƙƙarfan ulu: Girman igiyoyin ya kai kusan te 400, yawanci zuwa nau'i 4, kuma yawan adadin kowane nau'in ya kai te 100. Tsaftataccen ulu babban babban ulun ulu mai laushi ana jujjuya shi daga ulu mai kyau kuma yana da tsada. Tsaftataccen ulu mai tsaka-tsaki mara nauyi an yi shi da ulu mai matsakaici. Irin wannan yarn ulu ya fi kauri, ya fi ƙarfi, kuma ya fi jin daɗi. Sweat ɗin da aka saka yana da kauri kuma yana da dumi, kuma ana amfani dashi gabaɗaya don tufafin hunturu.
2, Fine ulu yarn: Stranded yarn yawa 167 ~ 398t, kullum kuma 4 strands. Akwai nau'ikan kayayyaki guda biyu: ulun da aka ɗaure da ulu mai siffar ball (ulun ƙwallon ƙafa). Wannan zaren ulu ya bushe kuma yana da tsabta, mai laushi don taɓawa kuma yana da kyau a launi. Tare da shi an fi saka shi a cikin sutura mai laushi, haske mai dacewa, don lokacin bazara da kaka, adadin ulu ya ragu.
3. zato ulu: wannan samfurin yana da fadi da kewayon launuka, iri kullum sabunta. Misali, siliki na siliki na zinari da azurfa, furen filawa na bugu, girman katako, layin madauki, bamboo, sarkar da sauran nau'ikan. Saƙa a cikin rigar bayan kowanne yana da fara'a ta musamman.
4. Saƙa ulu: gabaɗaya 2 igiyoyin yarn guda 2, galibi ana amfani da su don saka na'ura. Wannan suturar saƙa tana da haske, mai tsabta, mai laushi da santsi.