Vionic Men's Harrison Toffee Leather Oxford Shoes (13) Leather Upper material: NAPPA COW LEATHER Podiatrist-designed biomechanical orthotic footbed with deep heel cup helps support and realign the feet back to their natural position. 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. Recommended by renowned M.D. Dr Andrew Weil.