Suples Training Bag are designed by Bulgarian Olympian Ivan Ivanov who now lives in the United Stated training U.S. Olympic hopefuls. Don't be fooled by all the wrestlers, Suples Bags can be used by all. Suples range in size from 11 lbs. - 50 lbs. I highly recommend that if you're looking for a change of pace from the gym that you try a Suples workout. Stay tuned I'll be posting Suples Training tips all summer.