A highly technical shoe engineered for walking, Walk Max boasts our highest rebound yet with its rocker bottom outsole to enhance your walking motion, combined with super-critical foam for ultimate cushioning and Vionic's supportive footbed. Breathable mesh upper. Durable rubber outsole for traction. Tested by Heeluxe - the footwear industry gold standard - Heeluxe uses patented technology to analyse comfort and performance against competitive styles in conditions that replicate real-world wear. Vionic's lightest midsole yet, this nitrogen-infused midsole offers the highest rebound to enhance your walking motion. Water-repellent: treated with a water-repellent coating to repel water on contact. Vionic's Vio Flex footbed is a flexible, lightweight compound offering optimal moisture control, including a perforated heel for added breathability. Helps correct pronation and promotes full-body alignment, addressing 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. Upper: PU/Fabric Lining & Sock: Other Sole: Rubber Heel height approx. 4.57 cm