Answer:
(Fatwa: 1128/700/L=1432)
It is not right to do masah on the prevalent woollen, cotton and nylon socks. You should put off them and wash your feet while performing wudhu. If you do masah on them neither your wudhu shall be valid nor your salah.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
