Iran — the Muslim country where honor all century traditions. Men can’t appear in shirts with short sleeves or t-shirts here, and to girls — in short dresses and without headdress. Not only locals, but also all tourists have to observe these traditions.
If the woman appears in the public place without scarf, she can be arrested easily.
In Iran everywhere, including in hotels, the inscriptions «Respect Sharia and Follow Rules of Clothes» so it will be impossible to forget about wearing a scarf. In this country also forbidden western music so be sure that you carry with yourself earphones and check your ringtone on phone!