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.