Boosters appear as three green arrows, or "greater than" symbols, arranged in a position like ">>>". They are not connected, but closely interlocked. The outline of each of the arrows is light green, and the interior is a darker green. When the runner is using one, they will have a trail of green behind them.
Boosters will greatly speed up the runner for several seconds. After a few seconds the runner will gradually slow down to normal speed. However, if the runner touches another boost while still going fast, their slow-down will be delayed.