My video was inspired by Matt Wichlinski's video : Homemade Bulgarian Training Bag @ www.youtube.com/watch?v=il8rU0H-9ps My homemade version of the Bulgarian Bag is not meant to be a substitute for the original product : rather, I wanted to make a test version with which to try the exercises I had seen on the internet and see how I liked them. I was impressed with the overall workout I got using the bag with the exercises : it seems to be a very effective training method to include in an overall fitness program Ivan Ivanov is the creator of the original versatile and popular Bulgarian Bag. An Olympian himself, Mr. Ivanov is known throughout the world for his development of wrestlings best training and throwing dummies. The company he founded, - Suples, LLC - develops and manufactures unique personal training equipment for world class athletes and serious individuals alike. Visit the following sites for more information about the original Bulgarian Training Bag and related products : www.suples.com - www.suples.com/bulgarian-training-bags - www.youtube.com/user/suplestraining (less info)