Yahya related to me from Malik from Nafi from Abdullah ibn Umarthat a man once asked the Messenger of Allah, may Allah bless him andgrant him peace, what clothes someone in ihram could wear, and theMessenger of Allah, may Allah bless him and grant him peace, said, "Donot wear shirts, turbans, trousers, burnouses, or leather socks,except if you cannot find sandals. In that case you can wear leathersocks, but cut them off below the ankles. Do not wear any clothes thathave been touched by saffron or yellow dye."Yahya said thatMalik was asked about the hadith attributed to the Prophet, may Allahbless him and grant him peace, "Whoever cannot find a waist wrappershould wear trousers," and he said, "I have never heard this, and I donot think that some one who is in ihram can wear trousers, becauseamong the things which the Prophet, may Allah bless him and grant himpeace, forbade some one in ihram to wear were trousers, and he did notmake any exception for them although he did make an exception forleather socks."20.4 Wearing Clothes when in Ihram
USC-MSA web (English) reference: Book 20, Hadith 8
Arabic reference: Book 20, Hadith 715