Question about Electrolux UltraSilencer Zen EUS8GREEN

All "sbag" - bags. There are different types of them, you don't have to take the most expensive one :-)
sbag is a standard that some hoover manufacturers have agreed on - a good thing, because the variety of dust bags is a nuisance and then every shop has its own type numbers for its respective products. (Interdiscount / Fust / Coop belong together, but they differ when it comes to the bags :-(((