The Lil' Dragon Wavemaster was designed with young martial artists in mind. Each bag features four height adjustments and a rounded base for easy roll relocation. The Lil' Dragon Wavemaster logo is screened on one side of the bag, while the other side is screened with three colored shapes and numbers. Nylon shell covers high impact foam. ** Wavemaster® is a registered trademark of Century, LLC. U.S. Patent #5,624,358.