From Crocs, the Boys' Classic UFO Light Up Clogs feature:  Croslite™ upper Long-lasting LED lights; batteries are not replaceable Customizable with Jibbitz™ charms Iconic Crocs Comfort™: Lightweight. Flexible. 360-degree comfort Pivoting heel straps for a more secure fit Croslite™ foam outsoles for better traction, support and comfort Imported.