For tennis athletes whose strength on the court is speed, STRATOSPHERE IV will deliver. And because it’s versatile, it will also appeal to mid-high weight players, too. The overarching layers of technology make for a court-ready shoe. It’s lightweight due to Enerturn® cushioning, the Kurim® Toe Cap + LL40® Outsole HQ Rubber makes it durable, while the BFC® + FAS® structure makes for unparalleled foot support, and has overall motion sensitivity thanks to ReactiveArch® science. This is why STRATOSPHERE is endorsed by Lotto-sponsored pro tennis athletes. And new for SS18: the upper has been redesigned to enhance air intake and foot stability and balance. Clay and speed outsoles, as well as customized Ortholite® insoles, are available.