Rulings on Wiping over Leather Socks

Question:
The questioner asks: Shaykh, what are the most prominent rulings regarding wiping over leather socks, especially with the arrival of winter?

Answer:
The most prominent ruling is that they must be worn in a state of ritual purity, after the purity is complete. If one washes one foot and then puts on the sock, and then washes the second foot, he does not put on the sock. No, the purity must be complete before wearing the leather socks, as the Messenger of Allah (peace and blessings be upon him) said: Also, among the important rulings is that the leather socks must cover what is obligatory to cover, namely the ankles and what is below them, reaching the calves. If they are short and part of the ankles or what is below them is exposed, it is not permissible to wipe over them. The third matter is that they must be firmly attached to the feet, either by themselves or by being tied. If they are not firmly attached and one of them might fall off, then he does not wipe over them.
They must be firmly attached to the feet, and once he begins wiping over them, he does not take them off. If he takes them off after wiping over them, he does not continue wiping over them a second time unless he performs a complete ablution and puts them on again. As for building upon the first wiping after taking them off, this is not permissible and is not valid. Yes.