Here is what Leki have to say-

These poles, with their 16 mm high-strength aluminum shafts, are perfect for junior slalom racers. The Airfoil design ensures optimal aerodynamics. This is complemented by the newly developed Trigger 3D Pro G grip.

The new Trigger 3D System offers more control through a direct connection between glove and pole, improved ease of use through quick clicking and releasing, and a greater margin of safety through intelligent three-dimensional triggering that expands the trigger range fourfold.