ʻO nā uhi noho kaʻa ka mea kūʻai nui o nā mea nona nā kaʻa.E koho i kahi cushion kaʻa ʻoluʻolu e like me ke kau.I kēia manawa, aia ka ʻili, ka ʻili superfiber, ka ʻili artificial, ka nylon, ka fiber kemika, ka hulu manu, ka huluhulu polyester a me nā mea ʻē aʻe o nā uhi noho kaʻa.