This is the latest Saucony carbon plate model, the "ENDORPHIN PRO 4" Endorphin Pro 4. The cushioning and rebound have evolved even further than the previous model, and the combination of PWRRUN PB foam and PWRRUN HG foam provides a smoother and more powerful run. This top model is designed for races such as marathons and half marathons, and is a very popular shoe that balances lightness and stability. I have used it once for a full marathon and about 10 times for interval training. It's still in good condition. Size: 24.5cm Color: White Thank you for looking.