The city of Dubai is one of the most fashionable cities in the region with an amount of attention being placed towards being comfortable and stylish. The best approach when packing for your trip is to ensure that you are packing for comfort and style that is ideal for travelling around the city but also set aside some space in your luggage to ensure that you have some for a suit or semi-formal attire as well.
There is the belief that men will be able to enjoy their time in Dubai with no restrictions, however, keep in mind that the same rules apply to everyone and that you should be sure to follow the dress codes set about when in Dubai.