TYR - Men's RD-1X Runner

The RD-1X is equipped with the latest in foam technology, Surge NRG+ enhanced with supercritical foam for ultimate comfort, response and durable support for any movement. The lightweight upper continues to provide unrivaled airflow and response with added anti-stain-treated engineered mesh to keep you feeling fresh. A 10 mm heel-to-toe drop provides control for amplified acceleration moving you toward your goals faster.