Pre-stress

STRONGER – LIGHTER – BETTER RESPONSIVENESS
Prestressing means the intentional creation of initial tension in a structure for the purpose of improving its strength properties.

The concept of pre-stressed structure is widely employed in the design of buildings, underground structures, TV towers, power stations, floating storage and offshore facilities, nuclear reactor vessels, and numerous kinds of bridge systems.
The idea of prestressing was, apparently, familiar to the ancient Rome architects; the tall attic wall of the Colosseum works as a stabilizing device for the wall piers beneath.*

In kiteboarding, pre-stress allows the board to be loaded with energy during production. Storing the energy inside the board makes it a bit more stiff and much more torsion resistant, which results in astonishing POP. Pre-Stress technology also allows us to build thinner and lighter boards, yet still more durable.

* Definition according to wikipedia.com