The original tennis training shoe and a fan favorite, the K-SWISS ST329 gets a refresh for even better comfort and quality. The shoe features a new lightweight rubber formula outsole and an improved midsole compound for lighter weight and enhanced cushioning. A new mesh tongue adds moisture-wicking comfort and breathability to keep your feet cool and dry. The inside of the shoe features a cushy Smartfoam Strobel board and a premium Ortholite insole for long-lasting comfort. Along with our signature comfort features, this season we added a gel gradient heel tab that gives this icon a fresh update. Leather upper. Textile collar lining. Rubber outsole. CMEVA midsole. Ortholite sock liner. Lace closure.