Maximum support.The Extended Progressive Diagonal Rollbar (PDRB) brings your body back into its natural motor path, giving it more control. Comfort from morning to night. BioMoGo sna midsole adapts to your stride, weight and speed, giving you extra protection and 24-hour comfort. Non-slip. What stands between you and the lack of traction? An innovative, certified non-slip outsole (astm 144: 2011).