So far so good. Fits my signature Shop-Vac, but I'll admit they seem thinner than the factory bags. It actually broke a bit during assembly, so I'm deducting a star. I use a vacuum to collect dust and shavings from wood turning so it will be interesting to see how they hold up to such use. For now I'll probably buy again as they're certainly cheaper than the factory brand bags which are pretty hard to find in stock, locally at least.