And here’s the translation of part of a shiur Rav Ovadia Yosef gave about sheitels:
Those ladies who wear wigs, they think it’s mutar. They say no one said it’s assur. But we do tell them it’s assur. That’s what the sages said. They made a cherem- the Vilna Goan, the Yaabetz, the Chasam Sofer, Maharatz Chajes and other Gedolim. They all said it’s assur. And they say, No, so how come this Rabbi is quiet about it? He sees his daughter going out like that and doesn’t say anything. Why doesn’t that Rabbi say anything? His wife wears one. They fool themselves. And because they fool themselves, their conscience doesn’t bother them. They do it lechatchila, they think it’s mutar. And if someone doesn’t do it, they actually make fun of them. If so, their sin is twice and three times as great.
Where is the yirat shamayim? What about a person having to listen to the words of the sages that wrote this in their seforim? Am I just making it up? I brought this all down from the poskim. All of them. One after another, they all write that it’s assur. I didn’t just make it up- they all say it’s assur. Why should we transgress their word? For what? Just to look a little prettier? Is there any prettiness lacking in nice hats and fancy tichels? Silk, embroidered…? So what’s so hard- just wear one of those. It’s also better in terms of tzniut. This is the way of the Torah. A person must distance himself from pritzut. To make a gate around the Torah. Not that we should be looking at what looks like her hair. Why do they do this?
There are even yeshiva bechorim- woe to them! They say right from the start – I only want her to wear a sheitel. They have eyes but cannot see! Their eyes have been shut so they cannot see! Poskim, they can’t see! Great Gedolim they don’t see! They learn Baba Kama, Baba Metzia, Baba Batra. And these things they don’t know- they don’t want to know! Even if you tell them they won’t believe you.