These bags are not comparable with brand bags ...

because they are not really fit for my vacuum cleaner of Progress, although you would have to adjust, according to listing. The board, which is inserted into the holder seat correct, but is not rigid enough (it is also substantially thinner than Menalux or Swirl), thereby going fine dust past the bag, and dirty the vacuum cleaner from the inside, and sets the motor protection filter to. Furthermore, also disrupts the loud noise when sucking, because the cross-shaped cut rubber membrane which closes the hole from the bag, vibrate in the airflow and makes a noise madness. Overall, I'm very disappointed with this product, and am again switched to brand bag, though the cost more, but are much better.