Designed to break the mold, engineered with Vionics advanced recovery system VRX. This lightweight recovery sandal balances ultra cushioning, support and stability, and features a massaging footbed and dual-density cushioning. Designed for full body recovery, VRX advanced recovery technology combines revitalizing cushion with supportive stability. Tested by Heeluxe the footwear industry gold standard, Heeluxe uses patented technology to analyze comfort and performance against competitive styles, in conditions that duplicate real-world wear. Durable rubber outsole offers a secure grip on various surfaces. Sturdy thong toe post for a comfortable grip. Oversized sidewall and deep heel cup for maximum stability. Dual-density cushioning high-density core and soft layers function in tandem for active-recovery support. Podiatrist-developed biomechanical eva footbed contours texturized for massaging relief. Built-in vio motion technology footbed featuring contoured arch support and forefoot flexibility. Helps correct pronation and promotes full-body alignment and many different types of foot ailments. For optimal comfort, wear your new Vionic shoes for a few hours to let your feet adapt. Within 1-2 weeks, you should experience full orthotic comfort and support. Received APMA american podiatric medical association seal of acceptance. Imported Sole Rubber Heel height approx. 1 inches