These stylish, sturdy flip-flops for kids are made with top grade leather for durability and comfort. They are single layer, but don't have an arch because little feet don't quite need them yet. Each shoe comes complete with a non-slip bottom sole embossed with the Rainbow name. The leather strap is double stitched with bonded nylon thred using a box X stitching pattern. For the toddlers, the three smallest sizes come with a back strap. If you don't need it -- just cut it off! Premier leather with single layer and no arch Double stitched leather strap, box X stitch Sewn with durable bonded nylon thread Non-slip Rainbow bottom for reliable grip 3 smallest sizes have a back strap