Our best selling bag! The Original Wavemaster has a durable vinyl cover and high density foam. The base can be filled with sand or water and is rounded for easy roll relocation. Eight height adjustments from 47" to 68" allowing students to practice kicks and punches at different heights to take their training to the next level. Approximately 270 lbs when filled. Available in Black, Blue or Red Wavemaster® is a registered trademark of Century, LLC. U.S. Patent #5,624,358 **Note that there is an additional shipping fee of $15.00 for this item.