Men's SR-1 Tempo Runner Size (US):4.5 The lightweight upper continues to

The lightweight upper continues to provide unrivaled airflow and response with added anti-stain-treated engineered mesh to keep you feeling fresh

Featuring a secure lockdown lace system and a high-top knit construction

The RD-1X is equipped with the latest in foam technology

For a more traditional fit

Men's SR-1 Tempo Runner Size (US):4.5 The lightweight upper continues toSpeed. Traction. Lightweight comfort. The SR 1 Tempo Runner is equipped with the latest in foam technology, Surge NRG+ enhanced with supercritical foam for ultimate comfort, response and durable support for any movement. This runner features a lightweight monomesh upper for unmatched breathability that's perfect for interval training, jogging, or walking. It's designed to keep your feet cool and comfortable throughout your exercise routine.