Yonex Power Cushion SHT-304S Tennis Shoes PU leather and Tough Guard III provide exceptional durability while remaining comfortable Double Russel Mesh provides eight times better air-exchange. The ultra-fine mesh of this extremely lightweight and durable fiber structure provides eight times more air-exchange for releasing moisture than conventional mesh. A Y shaped TPU strap cradles the heel for support. Power Cushion allows you to step into stability and lunge out in shock-free comfort.