A man asked, "O Messenger of Allah ﷺ! What kind of clothes should a Muhrim wear?" Messenger of Allah ﷺ replied, "He should not wear a shirt, a turban, trousers, a headcloak or leather socks except if he can find no slippers, he then may wear leather socks after cutting off what might cover the ankles. And he should not wear clothes which are scented with saffron or Wars (kinds of Perfumes) . "  

يَا رَسُولَ اللَّهِ مَا يَلْبَسُ الْمُحْرِمُ مِنَ الثِّيَابِ قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَلْبَسُ الْقُمُصَ وَلاَ الْعَمَائِمَ وَلاَ السَّرَاوِيلاَتِ وَلاَ الْبَرَانِسَ وَلاَ الْخِفَافَ إِلاَّ أَحَدٌ لاَ يَجِدُ نَعْلَيْنِ فَلْيَلْبَسْ خُفَّيْنِ وَلْيَقْطَعْهُمَا أَسْفَلَ مِنَ الْكَعْبَيْنِ وَلاَ تَلْبَسُوا مِنَ الثِّيَابِ شَيْئًا مَسَّهُ الزَّعْفَرَانُ أَوْ وَرْسٌ  

I heard the Prophet ﷺ delivering a sermon at ʿArafat saying, "If a Muhrim does not find slippers, he could wear Khuffs (socks made from thick fabric or leather, but he has to cut short the Khuffs below the ankles), and if he does not find an Izar (a waist sheet for wrapping the lower half of the body) he could wear trousers."  

سَمِعْتُ النَّبِيَّ ﷺ يَخْطُبُ بِعَرَفَاتٍ مَنْ لَمْ يَجِدِ النَّعْلَيْنِ فَلْيَلْبَسِ الْخُفَّيْنِ وَمَنْ لَمْ يَجِدْ إِزَارًا فَلْيَلْبَسْ سَرَاوِيلَ لِلْمُحْرِمِ  

Ya'la said to 'Umar, "Show me the Prophet ﷺ when he is being inspired Divinely." While the Prophet ﷺ was at Ji'rana (in the company of some of his Companions) a person came and asked, "O Messenger of Allah! What is your verdict regarding that person who assumes Ihram for 'Umra and is scented with perfume ?" The Prophet ﷺ kept quiet for a while and he was Divinely inspired (then). 'Umar beckoned Ya'la. So he came, and the Messenger of Allah ﷺ was shaded with sheet. Ya'la put his head in and saw that the face of Messenger of Allah was red and he was snoring. When the state of the Prophet ﷺ was over, he ﷺ asked, "Where is the person who asked about 'Umra?" Then that person was brought and the Prophet ﷺ said, "Wash the perfume off your body thrice and take off the cloak and do the same in 'Umra as you do in Hajj."  

لِعُمَرَ ؓ أَرِنِي النَّبِيَّ ﷺ حِينَ يُوحَى إِلَيْهِ قَالَ فَبَيْنَمَا النَّبِيُّ ﷺ بِالْجِعْرَانَةِ وَمَعَهُ نَفَرٌ مِنْ أَصْحَابِهِ جَاءَهُ رَجُلٌ فَقَالَ يَا رَسُولَ اللَّهِ كَيْفَ تَرَى فِي رَجُلٍ أَحْرَمَ بِعُمْرَةٍ وَهْوَ مُتَضَمِّخٌ بِطِيبٍ فَسَكَتَ النَّبِيُّ ﷺ سَاعَةً فَجَاءَهُ الْوَحْىُ فَأَشَارَ عُمَرُ ؓ إِلَى يَعْلَى فَجَاءَ يَعْلَى وَعَلَى رَسُولِ اللَّهِ ﷺ ثَوْبٌ قَدْ أُظِلَّ بِهِ فَأَدْخَلَ رَأْسَهُ فَإِذَا رَسُولُ اللَّهِ ﷺ مُحْمَرُّ الْوَجْهِ وَهُوَ يَغِطُّ ثُمَّ سُرِّيَ عَنْهُ فَقَالَ أَيْنَ الَّذِي سَأَلَ عَنِ الْعُمْرَةِ فَأُتِيَ بِرَجُلٍ فَقَالَ اغْسِلِ الطِّيبَ الَّذِي بِكَ ثَلاَثَ مَرَّاتٍ وَانْزِعْ عَنْكَ الْجُبَّةَ وَاصْنَعْ فِي عُمْرَتِكَ كَمَا تَصْنَعُ فِي حَجَّتِكَ قُلْتُ لِعَطَاءٍ أَرَادَ الإِنْقَاءَ حِينَ أَمَرَهُ أَنْ يَغْسِلَ ثَلاَثَ مَرَّاتٍ قَالَ نَعَمْ