Our lightest, stiffest and most breathable shoe, the PRO Leader v4 features groundbreaking technology from top to bottom. The high-tech seamless upper minimizes pressure points by eliminating all stitching. An asymmetric closure places dual IP-1 Boa reels slightly off-center to avoid sensitive areas on top of the foot. The sole and upper are joined using a unique unibody construction to deliver a super low 5mm stack height for a powerful pedal stroke. Electroplating provides an unexpected flash of color to the bottom of this high-performance shoe.