The VENT CARBON SOLE features a light and replaceable heelpad to improve walkability in polyurethane and a replaceable integrated toe pad/vent cover. The key benefits of the VENT CARBON SOLE are not only superior power transfer, because of its light weight and stiffness, but also warm-weather comfort. The VENT CARBON SOLE is designed with an integrated vent and air channels for heat dissipation and air flow. The vent can be opened or closed for 4-season comfort. The VENT CARBON SOLE is handmade exclusively of carbon fiber in a weave pattern oriented at opposing angles that maximize stiffness while allowing for a small degree of controlled flex in the toe area. This carefully designed flex biomechanically relieves stress on the plantar tendon and helps promote circulation. The VENT CARBON SOLE features a standard 3-hole drilling pattern, printed 10 mm lateral and fore/aft cleat alignment scale as well as the Look Memory Eyelet for easy cleat alignment and replacement. For triathlon, the vent also serves as a water drain, dramatically improving foot comfort after a wet transition.