I chose this filter set because the original set in my vacuum was very worn. After looking at various options, I came to the conclusion that this is the best option. The original rectangular filter wasn't damaged at all, I just washed it and was able to put it back in. So I plan to replace it in a few months to extend the life of my vacuum cleaner. On the other hand, sponge and cotton fabric will be more damaged, so it's great that 3 pairs need to be replaced once in a while. Excellent purchase.