Sayoyo Baby Diamonds Soft Sole Leather Infant Toddler Prewalker Shoes 100% soft baby friendly leather, safety tested for peace of mind . Outer Material: Leather . Soft non-slip suede sole for comfort and protection . NOTE :For SIZE, please measure baby's feet to match the shoes's sole length, the age is just for reference. Because of the different measurement methods, there may be 1-3cm of the allowable range error.