Some roles (All soldiers, all tea, all lambs, mini mice, kartoshka) call for a different colored elastic than what comes with the shoe. To achieve this look, you will need to sew white elastic onto the shoe. Please note—you do not need to cut off the existing elastic, as you can just step on it while dancing.
Example shoe:
Because both the white and black elastics are on the shoe, the dancer can step on the one they’re not using, and only have the desired colored elastic show.