The holy grail of trail running is to provide both stability and flexibility, but to make a midsole stable yet soft has so far proven too difficult for PD teams world-wide. Upper material is a light yet durable nylon textile, and together with the lacing system it embraces the foot firmly. But it is the midsole construction, and the HGMS2 technology, that is the true innovation. Zeal provides a stable but soft heel grip, this is the impossible combo, made reality through the moulded midsole cradle on the interior side of the shoe. The midsole not only adds superb fit, it also turns into the reinforcement protecting the foot in serious terrain. The height of the heel cup is slightly reduced at centre back in order to reduce the pressure at the Achilles tendon. The torsion and cushioning is in fine balance and together with the low sole profile the ground control is just outstanding. The outsole cleats are positioned so mud doesn't get stuck, and as if the deep lug pattern wouldn't provide traction enough the RB9X outsole the benchmark among ''sticky rubbers''!