ough Little Piggies (TLP's) are a flexible-sole shoe that were designed so babies can grip naturally with their toes as they learn to balance! There are 3 very important features that TLP's offer! First of all, they are made with an elastic ankle that helps keep the from falling off. Secondly, the flexible-sole is made of a rubber material to give babies the best traction when they are learning to walk/crawl. Lastly, the flexible rubberized toe provides the shoe/material extra protection so that the fabric doesn't wear and tear, while also providing extra grip for crawling babies!