1. Ko etahi atu waahanga he anti-waikura me te aukati i te waikura, ka taea te urutau ki te taiao mahi kino, a ka taea e te oranga ratonga te tae ki te 20 tau.
2. Ko te weft o te kupenga whatu e whakamahi ana i te hangarau hurihuri, e whakanui ana i te elasticity me te mahi urunga, a ka taea te urutau ki te whakarereketanga o te roha wera me te whakaheke, kia mau tonu ai te taiapa kupenga i te ahua kikii.
3. He hanganga ngawari, he watea te tiaki, he wa hanga poto, he iti te rahi me te taimaha marama, hewari ki te kawe me te whakauru.