“After the first test” the contrada members rush from wherever they have been standing / sitting to their horse. They line up behind him and there is a slow progression out of the Piazza del Campo. The horse led by a handler, then the contrada members.
The horses are circled to cool off and keep them calm as they wait to exit.
The horse with the green and yellow headpiece is my guy, Lo Specialista!!
As these are just tests, the jockey is the only one dressed for the event in any way (you can see several of them in their silks in the slideshow).
As the race is bareback, all that needs to happen is for the jockey to jump of the horse, no saddle or saddle pads or such to worry about! Good to go!