Here is a great article regarding this subject
The most critical part of a bobsled run is its start. Teams focus on
explosive starts because momentum at that point strongly affects the
sled’s speed throughout the course. Saving one-tenth of a second
during the start often translates to saving one-third of a second on
the run as a whole.
The Olympics has strict rules against advertising on uniforms by athletes of all sports. These are outlined in the Olympic Charter, Rule 50 (Advertising, Demonstrations, Propaganda). This rule covers all sports. On clothing and accessories worn during participation "no form of publicity or propaganda, commercial or otherwise, may appear...." There is an ...