RS21 Cup is a series of events in the modern dynamic formula of fleet racing held in attractive locations.
What makes the RS21 Cup unique is the one design boat with attention to class image, media coverage and transparency.

Since 2020, the class has been established in many countries around the world, with the greatest growth recorded in Europe and North America. The class was granted international status by World Sailing.
Poland is the second country in the world to introduce the RS21 class racing series after Italy.