Rainbow Sandals's kids premier leather is on a non-slip Rainbow bottom with a single layer but no arch. Their shoes are made with top grade nubuck leather for durability and comfort. They are a single layer but do not have an arch because little feet don’t quite need them yet. Rainbow Sandals uses a non-slip bottom sole, which is embossed with the Rainbow name. The leather strap is double stitched with bonded nylon thread using a box X stitching pattern. Rainbow Sandals uses the best so that there is no fraying, and the stitching will not pull out. The toe piece is a 2000lb military spec nylon and is triple glued inside the sole. They are finished off with Rainbow's Original Rainbow woven label on the right toe.