Ballooning Tips and Tricks
There are actually not many restrictions for the passengers atop a hot air balloon. They are only required to dress casually and not wear high-heeled shoes. It may very well be that you would be required to trudge through fields to get to the launching ground or return to the base.
Popular myth has that, as you go up, the air gets colder. However, when you are on a balloon, the air is not much different from that prevailing on the ground. So, except for cold days, a light jacket will suffice when you are up in the air.