For the most part, Egyptian women can wear anything they would like but it should be considered appropriate. Just like in the United States, you would not wear a bikini to work or walk down the street in it. Instead, it would be okay if you wore it to the beach. In earlier times, it was not allowed.
There were many restrictions for Egyptian women and what they wore. However, times have changed and these women are freer to wear what they would like. They do not have to wear dresses. Instead, they could wear pants or even shorts if it is hot outside. They would choose the outfit they would like to wear and they would not get in trouble for wearing it.