oomis1105 – “And I heard that the purpose of the head covering (shaitel or otherwise) is to remind the WOMAN herself that she is an eishes ish, so she will not behave in an unseemly way. If that is true, then it makes no difference how realistic the wig looks. She is well aware of it at all times. Even the most comfortable wig is still REALLY THERE. We are always aware of it. “
This may be an additional hashkafadic point of wearing a sheitel, bu it is certainly not the halachic reason that a sheitel is worn.