These contemporary rain boots feature an adorable smiley face cutout for handy hands so your little one can easily slip them on. A classic piece in a fun, cross-generational design for toddlers, kids and juniors. 100% natural and ecological. The boots are made of waterproof natural rubber with a cotton lining. This material regulates temperature and is a natural sweat-absorbing material that keeps feet dry. Natural rubber is a plant material and, under certain conditions, insoluble particles can rise to the surface. As with leather, small imperfections are the hallmark of natural materials.