- Surge NRG+ enhanced with supercritical foam for ultimate response and durable support for any movement
- Engineered mesh upper
- Grooved outsole
- Molded sockliner
- 10mm heel-to-toe drop
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.
Size Chart
| US Men’s Size | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| US Women’s Size | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 14.5 | 15.5 | 16.5 | 17.5 |
| European Size | 36 2/3 | 37 1/3 | 38 | 38 2/3 | 39 1/3 | 40 | 40 2/3 | 41 1/3 | 42 | 42 2/3 | 43 1/3 | 44 | 44 2/3 | 45 1/3 | 46 | 46 2/3 | 48 | 49 1/3 | 50 2/3 | 52 |
| UK Size | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 |
| CM | 22.5 | 22.9 | 23.4 | 23.8 | 24.2 | 24.6 | 25.1 | 25.5 | 25.9 | 26.3 | 26.8 | 27.2 | 27.6 | 28.0 | 28.4 | 28.9 | 29.7 | 30.6 | 31.4 | 32.3 |
