Upper Material: Urethane Coated Leather (for durability) Collar: Padded Poly Urethane Collar Lining: Breathable Mesh Sock Lining with Agion Anti Bacterial Protection Against Odor / Breathable Mesh Upper Lining Shank: Natural Bamboo Shank (ECO Friendly) Outsole: Expanded Runner Outsole for Traction and Rebound Resistances: 100% Non Metallic