2171: Ruling on wiping over socks that have holes or are very thin
What is the ruling about wiping over ones socks if they have holes or are very thin?
Praise be to Allaah.
It is permissible to wipe over them instead of washing one's feet when doing wudoo, if they were put on when one was in a state of tahaarah (purity), unless the holes are bigger than is ordinarily acceptable, or the socks are so thin that the feet would be judged to be naked because they show the colour of skin beneath them.
Fataawa al-Lajnah al-Daaimah, 5/246.