Engineered for walking, these trainers boast a high rebound rocker bottom outsole to enhance your walking motion, combined with super-critical foam for ultimate cushioning and Vionic's supportive footbed. Features include a breathable mesh upper and a durable rubber outsole for traction. The nitrogen-infused midsole offers the highest rebound to enhance walking motion and is treated with a water-repellent coating. The Vionic Vio Flex footbed provides flexibility, moisture control, and breathability, helping to correct pronation and promote full-body alignment. For optimal comfort, wear for a few hours to adapt, with full orthotic comfort expected within 1-2 weeks. Upper: PU/Fabric. Lining & Sock: Other. Sole: Rubber. Heel height approx. 4.57 cm.