The Wavemaster has a vinyl cover that encompasses twice as much high density foam than the original wavemaster. It has eight height adjustments from 47” to 68”. The base fills with either sand or water and has a round base for easy relocation from the karate studio to your local martial arts competition for warm up. When filled to capacity, the Wavemaster weighs 270 pounds. The bag size is 17.5” in diameter and is 26” tall. It is offered in blue, black, and red for your preferred karate dojo colors. To compete with the best, you need to train with the best martial arts training equipment.