Women don't have to cover their heads while out in public at all times, but it is a mandatory requirement when visiting the Grand Mosque. Women cannot wear tight clothes, such as tight jeans or stretch pants either. Men and women, have to keep their arms and knees covered, so anything sleeveless is forbidden. Refrain from wearing t-shirts, tight polo necks shirts, cargo shorts etc. Wear loose clothing such as kaftans, baggy shirts and pants, kurta tops, long loose dresses and skirts. It is important not to express PDA with your significant others, be it friends or spouse. Touching one another is frowned upon, so take pictures in a respectful manner, especially when visiting Grand Mosque and the Shiekh Zayed Mosque.