Fi'zi:k cycling shoes are developed with a strong emphasis on physiological and anatomic research to ensure the best possible fit and performance. The Tempo R4's take advantage of that approach with the new Overcurve shoe construction. The asymmetric collar wraps around your foot, tracing the natural misalignment of the ankle's bony protrusions for a comfortable fit that's free of pressure points or discomfort. It's secured by a micro-adjustable Boa dial for a nice, even tension across the foot.