Fizik Transiro Hydra Shoe 45.5 White/BlackThe Fizik Transiro Hydra Shoe is a triathlon bike shoe engineered for performance, simpler transitions, a breathable upper, and a stiff outsole. These shoes are designed with a single Velcro strap to eliminate any chance of making an error while switching to the bike portion. The 3D printed air mesh allows plenty of air to pass through for a rush of cool air whether you are wearing socks or not. The newly redesigned R5 nylon outsole has moderate stiffness for pedaling efficiency and the cleat placement is slightly further back to reduce knee compression. There is also a wide vent inlet to increase the breathability further. Available in White/Black, White/Metallic Red, and White/Metallic Blue.F3039455