The guidelines for the development of the Zeal were focused on the need to have maximum control on very rough terrain. This speed control is achieved thanks to the synergy of the characteristics of the sole! The HGMS2 midsole provides support in torsion while the big toe remains flexible with an incredible feel. This midsole not only provides a fantastic feeling in the run, but its "U" shape turns out to be a reinforcement in the outer wall of the shoe, which protects the foot on the most difficult terrains. The shape of the shell then gives an enormous level of comfort and the lower central part at the back lifts the Achilles tendon from tension. The sole has been redesigned and developed according to our exclusive model. Combined with the RB9X compound, this sole has truly become the market benchmark. The upper material is very durable and light, even when wet. The big toe is housed in a sort of accommodation that allows you to run for a long time among the paths of the woods or along the paths of the OCR races.