OK, how healthy can a vacuum cleaner bag be? These bags are perfect for my old Royal vacuum. I wanted to try HEPA bags because our house had a lot of dust and I wanted to try something new to reduce the dust problem. With previous bags I could see the dust going through the vacuum bags when vacuuming in the sun. I did not notice the passage of dust on these new bags. Since I switched to HEPA bags, less dust builds up on furniture surfaces. I'm not sure if these bags reduce suction or how they get clogged with dust over time, but after a few months I'm happy with them.