The wudu is not broken but by what exits out from the two ends of urine or feces or wind or semen, and the sleep which removes the intellect. The wiping (al-masH) is not permissible [to be done] upon the turban nor upon the cap nor upon the khuffs or the socks except for from (i.e. because of) an enemy from one is doing taqiyya or ice/snow from which one fears for the feet, so the khuffs take the place of the splints (al-jaba’ir, pl. of jabira) and one wipes upon them. `A’isha narrated from the Prophet (s) that he said:

The most severe in regret of mankind on the Day of the Resurrection will be the one who sees his wudu upon the skin of [someone/something] other than himself. `A’isha said: That I should wipe upon the back of a wild donkey in the waterless desert is preferable to me than that I should wipe upon my khuff.