The Yonex Power Cushion Fusionrev 2 Clay court tennis shoes offer a truly modern and technical design for players looking for stability and a lighter weight package. A unique asymmetrical lacing and spiral, wrap-around design secures the foot for optimal stability. The Durable Skin Light material is flexible and strong to ensure maximum durability on the inside of the midfoot. Upper:Guard Durable Skin retains the shape of the upper to help prevent lateral movement of the foot inside the shoe. Padded heel collar enhances comfort. Padded tongue and heel collar enhance comfort. Lace-up front provides an adjustable fit. Midsole: Revolutionary 3-layer Power Cushion design uses a firm top and bottom layer to absorb 30% more shock than original Power Foam. Power Graphite Sheet keeps the foot stable and centered. ToughBrid Light is 11% lighter than ToughBrid while generating a significant reduction in leg and knee stress. Synchro-Fit Insole allows a closer fit between the shoe and foot, keeping power loss to an absolute minimum to achieve smoother movement and quicker footwork. Outsole: Non-marking outsole. Round Sole designed to provide all around support for quick and smooth footwork. Endurance Rubber. Made for use on clay court surfaces.