Kid-friendly WATERPROOF BOOTS, big girls size 4 Our waterproof printed rain boot with easy pull on handles is natural rubber, which is durable, flexible, and waterproof. The handmade vulcanization process reduces weak spots in our rubber Soft and cozy poly/cotton lining: Nobody wants to wear boots that are abrasive and rough – especially kids! We line our boots with soft, polyester/cotton blend lining to give comfort. Our lining also absorbs moisture Comfort insole: Children are rough on boots and need a comfortable insole to run around on. Our rubber boots are made with a cozy EVA insole. Our insoles are removable, making them easy to replace and clean