Short answer (whether you call them wudu socks, wudhu socks or masah socks): for most scholars, yes, provided the sock meets the same conditions that leather khuffayn meet. The debate about socks was never really about leather versus fabric. It was about whether a given sock does the job a khuff does. Here are the three conditions that come up again and again, and how a waterproof sock measures against each.
Condition 1: water should not pass through
This is the one ordinary socks fail. Pour water on a cotton sock and it soaks through to the skin, which means the sock is not really a covering at all. The Hanafi texts phrase it as the sock not absorbing water or letting it through; the Shafi’i texts require that it prevent water from reaching the foot.
A waterproof sock has a membrane layer between the outer knit and the inner liner. Tahara uses a Porelle membrane: water cannot pass through it, but water vapor (sweat) can escape. You can run the sock under a tap and the foot stays dry.
Condition 2: it stays up on its own and covers the ankle
The sock must cover the foot up to and including the ankle bones, and it must do so without being tied or held in place. A loose sock that slides down is not a covering. An ankle sock or a no-show sock is not a covering either, because the ankles are part of what is washed in wudu.
Tahara socks are crew height with a ribbed cuff that sits above the ankle and stays there.
Condition 3: you can walk in it
The classical texts say you should be able to walk a meaningful distance in the sock without shoes and without it tearing. The Hanafi measure is often given as a farsakh, roughly three miles. The Shafi’i measure is continuous walking for the usual needs of a traveler. Thin dress socks fail this. Thick wool socks sometimes pass it, which is why some scholars have always allowed heavy wool socks.
Tahara socks have an abrasion-resistant nylon outer and a knit sole. They are built as outdoor and sports socks first, and the walkability follows from that.
A fourth point: no large holes
Most schools also say the sock should not have a tear or hole that exposes a significant part of the foot. The Hanafi measure is a hole the size of three small toes. In practice: a sock with a hole in the toe should be replaced before you rely on it for masah.
What about the Maliki school?
The Maliki school traditionally restricts masah to leather coverings, and some Maliki scholars do not allow fabric socks at all. If you follow the Maliki school, ask a Maliki scholar rather than relying on this page.
Does the sock need to be leather?
No, according to the Hanafi, Shafi’i and Hanbali schools, as long as the conditions above are met. The hadith of al-Mughirah in Abu Dawud and Tirmidhi reports the Prophet ﷺ wiping over jawrabayn, non-leather socks. Many of the Companions are recorded wiping over socks. The word khuff describes a function (a durable foot covering you can walk in) more than a material.
How to check a sock yourself
- Run water over it on your hand. Does the inside stay dry?
- Pull it on. Does it stay above your ankle without you holding it?
- Walk across the room in it on a hard floor. Does it feel like something you could walk a few miles in?
If the answer to all three is yes, it meets the conditions as the majority understand them. If you are still unsure, bring the sock to your local imam. Most are happy to look at one.
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p class=”t-note”>Fiqh note: this is a practical summary, not a fatwa. Positions differ between the schools and between scholars within a school. Follow your madhab and ask a local scholar if you are unsure.