K-Swiss Express Light 2 HB Men's Tennis Shoes have a new upper and TPU shank for added stability and performance. Features include: K-EVA - K-Swiss foam for cushioning and durability. Aosta 7.0 Rubber - High durability is provided by this high-density rubber compound. 180 PSC - The Plantar Support Chassis is a 180 degree thermoplastic mid-foot support and stability. Durawrap Flex - a lightweight, durable material that provides protection and flex in high wear areas.