These bags offer great performance with one small caveat. After using this bag for 3 weeks on my industrial vacuum attached to a table saw and router table, the filter inside the vacuum was 98% clean. The bag catches dust and chips very well before they get into the filter. I will never have to change the filter again. Took the pouch bag outside and hit it, and the dust and shavings were released for reuse. These are excellent filter bags. The only thing that would be nice would be if they had a drawstring waist instead of an elastic. The elasticated top is great for my full size shop vacuum but it's not tight enough for my little one. The bungee cord fixed that, though. Great bags and they should last forever.