Conversation so far:
what is meant by bean bag without beans
Bean bags can be filled with polystyrene or thermocol beans or with air, called a bean bag without beans. Sometimes the term can refer to just the bean bag covers
do bean bags last a long time
A good quality bean bag is supposed to last for around 3 to 4 years without changing the beans.

Question: are the bags good for the back
Self-contained rewrite: are bean bags good for the back