Yosef Karo

“ And if she doesn’t have anyone who will stand over her, or it is at night, she should tie up her hair on her head with wool bands, or with the ribbon in her hair, provided that she loosens them, or she uses hollow link chains or if she ties a loose garment around her hair. ”

“ She must dunk her whole body at one time; therefore, it is necessary that there not be on her anything that is a barrier. And even if it is a miniscule amount, if [this thing on her is something] that people are sometimes concerned with [i.e. they would try to remove it] , it is a barrier, even if she is not currently concerned with it, or even if she will never be concerned with it, since it is the way of the majority of humanity to be concerned with it, it is a barrier. And if it covers the majority of the body, even though humanity is not concerned with it, it is a barrier. ”