Metallic finish, 100% sheepskin leather derby shoes. Adjustable lace closure. Flexible insole and 100% sheepskin tongue. Rubber sole. LEATHER: This product is made of an exclusive material. Any possible marks or color variations are characteristics that confirm the authenticity of the leather. STARFIT® TECHNICAL INSOLE FOAM: Flexible technical insole made of polyurethane foam. Comfort, cushioning, and durability.