People say “Don’t tell me what to wear, who are you to tell me what I should wear?” We need to advise each other, but in a nice way.
We were created by the Creator and we will return to Him. Allah (swt) tells us what to wear in the Quran. When we dress the way He has told us we are preparing for our life hereafter.
Why does Allah tell us what to wear? Allah knows there is benefit in it for this world and the next world. Allah (swt) says in the Quran the outer garment protects us and people will recognise you as a Muslim.