Ruling 181
After the impure sole of one’s foot or shoe has become pure by walking, the area on the sides of the sole that usually becomes dirty with mud also becomes pure.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)
Purity: Purification of Side Areas of Sole After Walking
Practical Laws of Islam as per the teachings of Ayatullah Sistani
