Hi Bushidoman, According to my friend who is practicing Yawyan, the giant baton bag is 7-ft tall, hardwood cored, rubber cement filled bag. I am not a yawyan practitioner ,but like this art verymuch.Another type of bag they use is rope spun around a big log covered with rugby/rubber cement.These informatins is taken from a yawyan discussion from another forum and is posted by yaw-yan practitioners .Picture of Giant Baton bag http://www.putfile.com/pic.php?pic=6/16115412438.jpg&s=f5 thanks