Explanation of the author's statement: "Covering the obligatory parts."

The Shaykh : Now, the third condition is "covering the obligatory parts". What does "for the obligatory parts" mean? It means for the parts of the foot that are required to be washed. So, it is a condition for the leather socks that they cover the obligatory parts, meaning the parts of the foot that are required to be washed. And "covering" means that nothing of the obligatory parts is visible through them, whether that is due to their transparency, their thinness, or because there are holes in them. These are three things. In other words, they do not reveal the skin due to their transparency, as if a person were to wear socks made of plastic. It is not that the plastic reveals the skin.

The questioner : What is the plastic?

The Shaykh : The plastic that is of the same type as glass. No, glory be to Allah, this is...