What is in this image? Describe it as if you were explaining it to someone from the 15th century.

The image depicts two figures, clad in what may appear as armor, but it is actually specialized attire for racing on a surface of ice, each balanced on two narrow blades fixed under their footwear. These blades, much like knives, allow them to glide swiftly across the ice. The figures wear helmets as guards against injury and carry themselves low and forward, closer to the ice, which suggests they are racing to outpace one another. Each figure also has eye covers attached to their helmets, resembling the visors of knights'' helmets, perhaps to protect their eyes from the cold wind or debris. They appear to be in a contest, judged by their posture of intense effort and the presence of flags and markings that might denote the course''s boundary or finish line in this icy competition. It is a sport of speed and balance, reminiscent of jousting in its competitive spirit, though without horses or lances, and performed on a frozen expanse instead of a field.