What is the usual clothing in Iran?
Women wear non-transparent, loose garments covering all their bodies except for the hands and face. Color is a free choice, but red, orange, pink or similar colors are not put on during national or private sad occasions. Black is not a must. Chador is not a must either, but when it comes to visit a holy mausoleum and you have the opportunity to experience wearing a chador for a few minutes, do not skip the opportunity to feel the atmosphere. Men put on non-transparent garments too. They may wear short-sleeve shirts or T-shirts (unlike women), but not shorts in the public. The choice of color is the same for men as well. Due to the heat of the Sun and in order to protect your skin, I would not recommend wearing short sleeve shirts. If you do, do not forget to put on some Sun block cream on your skin. But, it is your choice!