The RX4 was designed as a sporty all-round comfort harness. The dynamic outer shape and the elegant design of the sporty character emphasize that. Great focus was placed on maximum protection – so the innovative foam protector already offers outstanding safety in the critical take-off phase. A novel foam mixture provides the considerable attenuation values of 28.5 G and is characterized by very fast regeneration after compression. This was confirmed impressively during the certification process, the three test runs could be absolved with only 10 minute brakes, although 30 minutes are the standard. The RX4 was developed from practice for the practice. Under the direction of Jens Salomon the influences of over 25 flight instructors were incorporated in the development. Among others, also the modular agility system in which three individual adjustment options to dampen the movement of the paraglider. The first stage (green) subdues the reaction behavior and even compensates for gliders prone to unrest. At the middle level (yellow) the damping and movement keep the balance and at the third level (red) movements are transferred as in sport mode undamped. The three levels are color-coded and can be adjusted to the personal pilot‘s needs before the flight.