UPPER Multi-panel upper (5) for the best custom moulding fit. PU cage on a seamless microfiber panel minimizes stretch and spreads the pressure of the lacing system across the upper. INSOLE Half-length Flexan 1.0mm insert spreads the force in the forefoot and allows for excellent flexibility in the rear of the shoe. ACTIVE RANDING Bi-Tension active randing system runs under the toes and draws back through the arch of the foot to give great flex with subtle tension. The PAF System is an innovative heel system that helps both spread the force of the heel tension and increase the fit of the heel.SOLE 3.5mm 2/3 length XS Edge sole with a hand-constructed 2mm XS Grip 2 heel.