Kswiss Pro Defier DS-HC Tennis Men's Sneaker White Blue The K-Swiss Defier RS is engineered to stand up to the most intense game. The DuraWrap provides a durable barrier between the court and the foot. The abrasion-resistant DragGuard is placed in the toe and the heel of the Aosta 7.0 rubber outsole. The outsole features non-marking and a clay-friendly herringbone tread pattern for multi-surface traction .