Though there is no formal dress code, the very common and traditional attire is white pants, white shirt with a red scarf around the waist and a red handkerchief around the neck. The majority of runners are similarly dressed, many times with red wine stains from the previous night or earlier in the festival.
Another common dress practice, seen as a risk by some but as a daring depiction of courage by others is dressing in a conspicuous manner. Many runners that want to be perceived as daring wear colors other than white, a common alternate color choice is blue. Blue is thought by some to draw the bulls' attention. Others include large logos on their shirt to capture the attention of the bulls, note the large Clemson University Tiger paw as an example. In the age of social media explosion, this also thought to be a way to highlight someone in a photo.