What one who has entered Ihram for Hajj or Umrah is permitted to wear, and what is not permissible, and perfume is forbidden for him Sahih Muslim 1177 c
Arabic hadith text
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ، عُمَرَ - رضى الله عنهما - أَنَّهُ قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلمأَنْ يَلْبَسَ الْمُحْرِمُ ثَوْبًا مَصْبُوغًا بِزَعْفَرَانٍ أَوْ وَرْسٍ وَقَالَ " مَنْ لَمْ يَجِدْ نَعْلَيْنِ فَلْيَلْبَسِ الْخُفَّيْنِ وَلْيَقْطَعْهُمَا أَسْفَلَ مِنَ الْكَعْبَيْنِ "
Translation
Ibn 'Umar reported that the Messenger of Allah (ﷺ) forbade the Muhrim to put on a cloth dyed in saffron or wars and he further said
One who does not find shoes (to wear) he may wear stockings, but (only) after trimming them below the ankles.