What/why tape showing on some women gymnasts?

Some of the women gymnasts had various lengths of flesh-colored tape (2-3" wide) sticking out from under their uniforms and going down their legs. I didn’t see any on the U.S. team. What kind of tape is this, and what is its purpose?

Athletic taping

Value is debatable.

Elastic therapeutic tape
Kinesio seems to be the current popular brand.