Masah means wiping. Questions about wiping over footwear during wudu often arise in cold weather, but scholars differ on conditions, especially for ordinary cloth socks compared with leather khuffs. This page is an orientation for asking questions, not a fatwa or permission for a particular pair of socks.
Know what footwear is being discussed
Leather khuffs are a traditional form of footwear discussed in Islamic law. Everyday cloth socks, thick socks and modern waterproof socks are not automatically treated as identical to them by every scholar.
A product name or a claim that socks are 'wudu friendly' does not settle whether they meet the conditions of the school you follow. Show the actual footwear to a trusted local scholar rather than relying on a label.
Why answers can differ
Schools of thought and scholars differ on relevant footwear materials and qualities, including coverage, thickness and durability. There are also conditions concerning the state in which footwear was put on and the circumstances of wiping.
Do not combine fragments of different answers into a new method or assume that cold weather by itself resolves the question. Ask a trusted scholar of your own school to explain the approach you should follow.
Take a clear question to your teacher
Explain the type of socks or khuffs, how and when you put them on, whether you are travelling, and any health or practical difficulty. Ask which conditions apply, how wiping is performed and what ends the permission in your circumstances.
Ask about any applicable time limits and how they are counted rather than guessing a duration from a short online summary. If a medical issue affects washing or footwear, seek appropriate clinical advice as well as religious guidance.
Prepare for the mosque without assuming an answer
Allow enough time and use the mosque's wash facilities considerately. Check practical arrangements for shoes and wash areas, and avoid making a wet floor unsafe for others.
Do not correct or judge another visitor based on this overview. Follow the guidance you have learned from a qualified scholar, and ask further questions privately and respectfully if unsure.