Nylon 6,6 with glass fill plate provides competition ready sole that is stiff but still walkable in. Rubber outsole and dual toe cleats provide for traction in all conditions. Tough TDW Mesh and proprietary Teijin synthetic leather upper is soft, strong, and super light weight. Dual straps with velcro brand enclosures provide for a secure fit. TPU external tip protects the toes from nasty rocks and roots. Sole and slots are designed for superior interaction with the best 2 bolt pedal systems. Built on Nike's italian crafted cycling last for proven comfort and support.