As a metabolised city in the country of Turkey, Istanbul is pretty lenient about what you can wear. Normally, a lot of women in Istanbul dress in short-sleeved tops, shirts, dresses, and skirts, or loose trousers during the summer ward of the heat. men usually dress in long trousers and T-shirts or shirts. When planning to pack for your Istanbul holiday packages, you can carry shorts, skirts, dresses, T-shirts, shirts, or trousers. just make sure not to dress too provocatively and cover your body completely when visiting a mosque.