Kake-eri and Tomoeri are sometimes used to indicate the differences: When this part is made of the same cloth as that of Nagagi, it is particularly called Tomoeri, and when this part is made of cloth in a darker color than that of Nagagi so as not to distinguish the stain from the cloth, it is called Kake-eri.
表生地と同じ生地を用いるときは特に共衿と呼ばれ、汚れが目立たないように違う濃い色の生地を用いるときに掛衿、と呼ぶこともある。