I demolish 1000 sqm. Meters of blanket and insulation to repair old water damage and replace with better insulation and blanket. I decided to try them in my cheap vacuum as the old filter clogged up very quickly and spewed back some fine dust. It works well for a vacuum and I'm surprised the bag still doesn't fill up quickly despite picking up a few large pieces of plaster and insulation with smaller objects. I took out the bag to see if it was clogged and found the dirt was fairly well spread out, shook it all the way down, put it back in and got to work. Now I only use the second bag, they serve well and I am happy with the purchase.