Ladies will have to keep their arms and legs covered at all times while in public. So, pack adequate lightweight loose cotton shirts, blouses, and kaftans, which are all great options. Skirts should be long and fall below the knee, and so should all dresses. Although not essential, a shawl would be ideal to cover your hair in more conservative places like mosques. Stick to baggy trousers because you won't be able to wear any tight jeans or leggings.
Men should refrain from wearing tight shorts and cropped t-shirts that reveal the body. Pack sufficient cotton shirts, t-shirts and comfortable long trousers and shorts that fall below the knees.