The Fizik R4 Tempo Overcurve features a classic aesthetic with an advanced construction technique. A resilient polyurethane laminated material is combined over a comfortable mesh, providing long-lasting foot support. The closure is fast and secure, powered by a micro-adjustable BOA IP1 dial in an Overcurve pattern. This shoe construction wraps around the ankle, tracing the natural misalignment of the ankle's two bony protrusions. The result is an asymmetrical shape, with the throat of the shoe curving over the foot from its outside to its inner side. The moderately stiff R4 outsole strikes a balance between comfort and pedaling efficiency, making it a true all-rounder. It has a new, even lower profile, and is structurally optimized with a composition that includes 15% infused carbon fiber. The R4 outsole provides efficient ventilation and internal channelling for temperature regulation.