I originally bought one package of filter bags when I purchased my Fein vacuum. The original bags worked excellent, easy to install, remove and filled completely. So I re-ordered two packages by going into my order history to assure that I received the correct bags. What I received were the "correct" bags, however they apparently have been redesigned by placing the inlet port far off center, where as my first set had the inlet port dead center. Why anyone would consider doing this is beyond me, now I am lucky if the bags fill to half capacity, at which time I need to remove the bag, manipulate the contents down towards the long leg of the bag and do my best to cram the thing back into the vacuum to continue with my task. So again, I am quite perplexed by this, I can't believe that this design was ever tested against the original. While I run into things everyday that I feel need to be re-designed this was not one of them. I have not yet had the time to look into this matter further to see if in fact the original design is still available. While the bag itself is well built and filters well the performance (dare I say it) sucks!