The K-Swiss Defier RS mens tennis shoes are developed for the highest level of competitive play and subsequently the players who seek ultimate protection and stability when engaging the toughest opponents. The upper is made from a combination of leather and synthetic overlay to create a generous, comfortable fit, plus theres the textile collar lining and special Heel Grip lining to keep the footwear from slipping. The midfoot stability is enhanced with the 180 PSC Plantar Support Chasis, and the Shock Spring cushioning technology creates a stunning, responsive underfoot that dissipates incoming impacts in the landing phase. Furthermore, the shoes are equipped with the revolutionary, rubber compound called the ASTA 7.0 to establish a super-durable, wear-resistant outsole that ensures incredible traction on all playing surfaces.