The Head Super Shape Titan Ski System is like the sports car of skis. Head's brilliant Kinetic Energy Recovery System stiffens the ski when you reach the apex of a turn for maximum power. Going into the turn the ski actually stores energy in electric fibers and releases it as you transition to the next one for incredible rebound. Throw in a race structured UHM C base and you have one fast dynamic ski. SKI ONLY, BINDING NOT INCLUDED. KERS - KERS Technology works like a turbo charger that provides additional power and acceleration by stiffening the tail of the ski in outturns. Skis experience maximum flex at the end of a turn. At this moment the energy is released into the fibers of the tail. The tail of the ski then stiffens up, immediately increasing rebound for maximum acceleration at the end of the outturn. Piezoelectric fibers transform kinetic energy into electrical energy which is stored. Electrical energy is immediately released to areas of the ski, where additional energy is requested. Timing and release are automatically controlled and coordinated. Depending on the flex pattern of different ski models, sensors are programmed beforehand: the more aggressive the ski has to be, the stiffer the tail will become.