A highly technical shoe engineered for walking, the Walk Max boasts Vionic's 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. Designed with exclusive alignment technology to balance your whole body. Features a breathable mesh upper and a durable rubber outsole for traction. Tested by Heeluxe, the footwear industry's gold standard, using patented technology to analyze comfort and performance against competitive styles in real-world wear conditions. Vionic's lightest midsole yet, this nitrogen-infused midsole offers the highest rebound to enhance your walking motion. The shoe is treated with a water-repellent coating to repel water on contact. The Vionic Vio-Flex footbed is a flexible, lightweight compound offering optimal moisture control, including a perforated heel for added breathability. Built-in Vio Motion technology footbed featuring contoured arch support and forefoot flexibility, which 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. Heel height approximately 1.8 inches (4.5 cm). Upper: PU & Fabric. Sock & Lining: Fabric. Sole: Rubber.