Born on the tennis court, perfected for everyday life—K-Swiss brings you premium craftsmanship, all-day comfort, and effortlessly clean style. From sport to street, every pair delivers the confidence and quality you can feel in every step.he Rival Trainer is a stylish take on the traditional athletic trainer. Inspired by from our popular Si-18 Rival sneaker, the Rival trainer takes many styling cues from the original, including the panel layered upper, traditional 5 stripe design, and material mixes. Built to take color and materials in eye-catching fashion, the Rival trainer looks equally good in clean white. The rubber cup sole pays homage to traditional K-Swiss heritage court shoes, but the sculpting details give the shoe a fresh, athletic twist.