Custom Kimono

"Shiki's Kimono [Ornament]
A luxury item that was not immediately apparent to the eye. It appeared to be an unremarkable kimono, but the quality was revealed in the fine details. If you ask which part of it is haute conture, it must be that Shiki could still perform high kicks while wearing a kimono.
In a related note, the early concept of Shiki was "a juxtaposition of Eastern and Western concepts" (or literally "an unhomogenized compromise between the East and the West")."

 Kara no Kyoukai Special Pamphlet - Encyclopedia: Shiki's Kimono [Ornament], p.032