Thin sole - it's like a skid-proof thin fabric added to the suede soles
Walker sole - 2mm flexible rubber added to the suede soles.
*This leather is distinct and unique, just like your kiddos. Therefore, please keep in mind that the leather may look a little different from the product picture, i.e. it may have a little more grain or be slightly darker or lighter. That's what makes these Mary Janes so unique ♡