O, Dear Sister…
Preserve the Islamic veil which God has privileged you with, as it is your inviolable fortress, for your hair is one of the beauty aspects in you.
Also, you have to wear loose, flowy clothes which don’t particularize your body, especially the beauty areas….. as this is the right Islamic veil.
God Al-Mighty said: ﴾O Prophet! Say to your wives and your daughters and the women of the believers that they let down upon them their over-garments; this will be more proper, that they may be known, and thus they will not be given trouble﴿. The Allies-59
There is no problem with wearing trousers under the clothes in the intention of concealing oneself; as it was told that a woman was on top of a donkey, and it fell, so the woman fell as well, and the Prophet (PBUHH) shunned his face away; so his companions said: O Prophet, she’s wearing trousers, he said: “God forgive the women who wear trousers, three times... Fellow people, do wear trousers as it is the most concealing and preservative of your clothes, and protect your women by wearing them, if they go out”.
* Book: O, Dear Sister. By Sayyed Sami Bin Hassan Khadra.