Maraton Joanna carriages are designed for both large horses and pony horses. They are successfully used for professional sports competitions. A lightweight construction with a classic straight line is characterised by low weight while maintaining good driving characteristics. The Joanna and Hartland III carriages differ in their springs. In the former, the suspension structure is based on semi-elliptic springs, while in the latter elliptical springs are used.

With slight structural changes, they can be used for two-horse pony teams.

The Joanna and Hartland Sport III carriages fulfil the requirements of the International Federation for Equestrian Sports [FEI - FÉDÉRATION EQUESTRE INTERNATIONALE].