Men are required to wear two non-stitched woven sheets. I have read that whatever else they may wear should also be non-stitched.
I think the prohibition was for the apparent garment only. Even though it was allowed to wear trousers if a person can not get a (Izar) lower garment in ihram.
Narrated Ibn ‘Abbas:
The Prophet said, “Whoever cannot get an Izar, can wear trousers, and whoever cannot wear sandals can wear Khuffs.” (Bukhari)
So, can we wear underwear under the lower garment?
I think one can and one should. Since it is not visible so the apparent simplicity of the dress code for the Hajj or Umrah is not affected.
Please comment on this.
According to the established Sunnah of the Prophet (pbuh), a male should not wear any stitched (or formed) clothes. The referred narrative relates to an exceptional situation where a person does not have any sandals or a piece of cloth that he may use as Izar. In such a situation, the Prophet has allowed him to wear “Saraweel” (a kind of a trouser) and “Khuffain” (a kind of socks). According to my understanding, therefore, wearing any sewn clothes – even under garments – is against the Sunnah of the Prophet (pbuh).
I hope this helps.
May 29, 2002