It was narrated from ‘Abdullah bin ‘Umar that a man asked the Messenger of Allah (ﷺ), what clothes may the Muhrim wear? The Messenger of Allah (ﷺ) said: “He should not wear a shirt, or turbans (or head cover), pants or pajamas, hooded cloaks and no leather socks, unless he cannot find sandals, in which case he may wear leather socks but should cut them to below the ankles. And he should not wear any clothes that have been touched (dyed) with saffron or Wars.”*
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَبُو مُصْعَبٍ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَجُلاً، سَأَلَ النَّبِيَّ ـ صلى الله عليه وسلم ـ مَا يَلْبَسُ الْمُحْرِمُ مِنَ الثِّيَابِ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " لاَ يَلْبَسُ الْقُمُصَ وَلاَ الْعَمَائِمَ وَلاَ السَّرَاوِيلاَتِ وَلاَ الْبَرَانِسَ وَلاَ الْخِفَافَ إِلاَّ أَنْ لاَ يَجِدَ نَعْلَيْنِ فَلْيَلْبَسْ خُفَّيْنِ وَلْيَقْطَعْهُمَا أَسْفَلَ مِنَ الْكَعْبَيْنِ وَلاَ تَلْبَسُوا مِنَ الثِّيَابِ شَيْئًا مَسَّهُ الزَّعْفَرَانُ أَوِ الْوَرْسُ " .
sunnah.com