Men's sneaker with Breathable mesh upper, Vionic's Vio-Flex footbed is a flexible, lightweight compound offering optimal moisture control including a perforated heel for added breathability. Durable rubber outsole for traction. 1.8" heel height. 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. Vionic's lightest midsole yet, this nitrogen infused midsole offers the highest rebound to enhance your walking motion. 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. Water Repellent: Treated with a water repellent coating to repel water on contact. 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.