UPPER Multi-panel upper for best custom moulding fit. Full microfiber with twin Velcro straps. INSOLE A cleverly-shaped minimalistic Flexan 1.0mm insert with a floating big toe pad for ultimate sensitivity. Its supporting strip runs along the foot. ACTIVE RANDING The DTS active randing system provides tension in two different strengths on either side of the foot. This torque helps drive power towards the big toe and further enhances the asymmetrical shape. 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 1/3 length XS Grip 2 sole for excellent flexibility.