The RS-9000 marks a new turning point in the history of competitive running. Designed for runners who demand maximum efficiency, responsiveness, and control, it brings J Lab innovation straight to the starting line.

Every detail has been optimized to eliminate weight. Smooth stride, instant response, and an absolute feeling of lightness with every step.

It features Light Reactive technology, a highly responsive PEBAX compound that provides lightweight cushioning and explosive energy return. Its internal carbon plate enhances propulsion and stability, while the technical nylon thread upper with polyamide reinforcements ensures fit, breathability, and thermal comfort with minimal weight.

Validated in real conditions by elite athletes such as Chiki Pérez and Stella Rutto, the RS-9000 has been fine-tuned to deliver optimal performance at race pace and over long distances. A shoe created, tested, and perfected in collaboration with those who live at the edge of speed.

Every gram counts. Every step drives innovation. Because running faster isn’t enough — it’s about pushing beyond the limits of body and time.