Answer: 1. To put on the leather socks while being in a state of Tahārah (ritual purification), i.e., after performing ablution.

2. The leather socks must be pure, since it is impermissible to wipe over what is impure.

3. The leather socks must cover the whole feet including ankles.

4. Wiping over leather socks must be within the limited period of time, which is a day and a night for a resident, and three days and three nights for a traveler.