With the best-selling Vertical ST model, DYNAFIT engineers and designers have just recently taken it to a new level. They succeeded in satisfying diametrically opposed requirements (stronger but lighter) while improving and streamlining certain details (such as the ski stopper and rotation control). The need for extreme skier retention in the rear binding and the durable crampon attachments made it necessary to calculate teh correct structural ratios and choose the most suitable materials with care. The result is amazing compared to the 08/09 model: 20% higher durability, greater comfort of use combined with greater lightness, more precise distribution of force. For more ski touring performance, whether uphill or downhill.