Wear izars and ridaʿs and wear shoes, but take off boots and pants; throw away the stirrups and jump onto your mounts. You should wear rough clothes and practise archery, and keep away from luxury and the dress of the non-Arabs, Beware of silk, for the Messenger of Allah ﷺ forbade it and said: ʿDo not wear silk except this muchʿ - and the Messenger of Allah ﷺ gestured with two fingers.  

أَنَّهُ قَالَ اتَّزِرُوا وَارْتَدُوا وَانْتَعِلُوا وَأَلْقُوا الْخِفَافَ وَالسَّرَاوِيلاتِ وَأَلْقُوا الرُّكُبَ وَانْزُوا نَزْوًا وَعَلَيْكُمْ بِالْمَعَدِّيَّةِ وَارْمُوا الْأَغْرَاضَ وَذَرُوا التَّنَعُّمَ وَزِيَّ الْعَجَمِ وَإِيَّاكُمْ وَالْحَرِيرَ فَإِنَّ رَسُولَ اللهِ ﷺ قَدْ نَهَى عَنْهُ وَقَالَ لَا تَلْبَسُوا مِنَ الْحَرِيرِ إِلَّا مَا كَانَ هَكَذَا وَأَشَارَ رَسُولُ اللهِ ﷺ بِإِصْبَعَيْهِ