During the heyday of the Taira clan at the end of the Heian period, the use of brocade meant that uchiki were too heavy to wear in many layers and as a result, layers became less important.
平安時代終わりの平氏全盛期には素材は錦となり、重量の重さから過度の重ね着ができなくなり、襲を重視しなくなっていったとされる。