These rubber wellies change colour while walking in the rain or splashing in puddlestheyre magicmaterial contentuppers rubberlining 60 polyester 40 cottoncushioning textilesole rubber groovedplus detail handles on each side to help the child pull on boots left and right foot distinction the colour distinction on the side of the insole makes it impossible for the child to switch bootswhat you need yo knowwe recommend you check your childs shoe size using a foot scaleand order the s