The Instinct VSR offers the option of the softer XS Grip 2 rubber sole for increased smearing ability, especially on plastic walls. Slightly asymmetrical and downturned shape, with a medium angled toe box. UPPER Multi-panel upper (6) for best custom moulding fit. Full microfiber upper with a single Velcro strap and a deep Y attachment for secure hooking. 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. SOLE 3.5mm 1/2 length XS Grip 2 sole with a hand-constructed 2mm XS Grip heel.