Hey fast players, this is the shoe for you! The S. Challenge 4 SL CLAY is the men's tennis shoe especially designed for the fastest players and specifically for use on clay courts. With the B and W SuprellTech Plus air mesh upper, removable ergonomic fabric and shockproof EVA foam insole and wear resistant Duratech 5000 sole, with these trainers on your feet you’ll feel even more agile and light: try them.