Our original tennis training shoe and a fan favorite, the 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.