Dust was a huge concern as I live in the dead centre of the dust bowl, where dust storms are common and I run my printer in my garage, the second I saw these things I knew I had found a lifesaver for my filament that didnt include mounting a drybox ptfe tupe directly to my bowden(although that will be done in the future) this is a great, cheap solution to keep your filament dust free in similar enviornments, west3d-best3d