Max cushioning is uniquely balanced with support and stability. Featuring a lightweight midsole rebound technology to enhance your walking motion, this sneaker goes the distance. Also available in Wide. Water Repellent Upper: Treated with a protective coating to help against inclement weather. Super Critical Foam: Vionic's lightest midsole yet, this nitrogen infused midsole offers the highest rebound to enhance your walking motion. Vio Flex insole: featuring a flexible, lightweight compound offering optimal moisture control including a perforated heel for added breathability. Upper: Breathable mesh fabric. Footbed: Removable mesh covered EVA Heel Height: 1.75". Platform Height: 1.125". Outsole: Durable rubber. Available in women's whole and half sizes Medium (B) widths, sizes 5, 6-11, 12, 13 Each pair of Vionic shoes contains VIO MOTION™ Technology which means that there is either a built-in or removable average orthotic in the footbed. Please learn more about Vionic here.