Mary Janes in 100% sheep leather. Double crisscross straps at instep for a better fit. Flexible insoles in 100% sheepskin. Rubber soles. LEATHER: The material used to make each product has its own unique features. Any possible markings or color variations are signs of the authentic nature of the leather used. STARFIT® TECHNICAL INSOLE FOAM: Flexible technical insole made with polyurethane foam. Comfort, cushioning, and durability.