Orthaheel Vionic Endurance - Mens Walking Shoes Grey - 8.5 Medium Leather Synthetic sole Podiatrist-designed, biomechanical orthotic footbed with deep heel cup helps support and realign the feet back to their natural position. Lightweight, flexible EVA midsole absorbs shock to reduce pressure on the feet, ankles and knees. Durable rubber outsole with patterned tread provides traction on a variety of surfaces. Clinically shown to help relieve common causes of plantar fasciitis, heel pain and knee pain, related to over pronation and flat feet. Has the American Podiatry Association Seal of Acceptance.