PolyformUS.com has been manufacturing marine buoys in Kent, WA for over 50 years. I saw a few DIY videos showing that these can function as high-quality aqua bags / teardrop bags. With all the “at-home” training, a 120 lb bag would not cost much from Amazon.
The great thing about working with Rob is that he is willing to integrate many different forms of martial arts into class, which makes each class as interesting as the class before. Every day we learn something new on top of getting an excellent workout. I was nervous when I first started class, as I had no prior training in any form of fighting or martial arts, but everyone in class was extremely helpful and Rob is always there to make sure you understand what is going on and how to do things properly.