pediped Flex Jackie Boot (Little Kid/Toddler) 100% Synthetic Imported Synthetic sole Shaft measures approximately 3.25" from arch Heel measures approximately 0.75" Platform measures approximately 0.5" Lightweight, flexible, non-marking sole Comfortable, breathable leather lining Velcro strap for adjustability Approved by the American podiatric medical association for promoting healthy foot development Endorsed by researchers associated with children's hospital Boston and Harvard medical school