Uku kubyimbye ni umuhanga mu gutanga amazi meza ya koleji ya elastike, ntashobora gukoreshwa mugukora ibicuruzwa, ibicuruzwa 35% birimo ibintu bikomeye, bikora inkunga ikomeye ya gel, itajegajega, ifata imiterere kandi ikoreshwa mumashanyarazi maremare ya elastike cyane cyane mubyimba () bitandukanye nubushyuhe busanzwe, kwiyongera icyarimwe byongera ubwiza bwikurikiranya) .Bishobora guhindurwa uko bishakiye ukurikije ubunini buke bwa kole nshya, byoroshye kandi neza;