These are good products and I'm so glad I can wash/change them in my Dyson. We use our vacuum cleaner a lot and I also use Dyson to collect ash from our pellet stove in the fall and winter. The fly ash from a pellet stove is very small, so the vacuum filter can easily become saturated with ash. I wash the filters sometimes but this filter should be changed once a year so for the price it's easy to change. I think this is a quality product!