WOW these bags are NOT 4 ply like the description says it's just a cheap flimsy paper lunch bag with a C style lid that fits an Electrolux vacuum! BEFORE trying any of these bin liners, I put a new genuine Electrolux filter in the vacuum, then installed the bag and after about 10 minutes, due to a cheap, poor quality bag, my vacuum shut off and the bag light came on to indicating the bag was full when actually it was 99.9 percent empty! I kept resetting the vacuum to try and get it working. The bag was essentially empty and I swap bags, swap a cheap bag for another cheap bag. The vacuum cleaner just stopped working. This time I'm looking at a brand new filter I just installed and I was stunned when I saw it. It was black from clogging up from all the little debris that went through those CHEAP NOT 4 PLY LUNCH BAGS that pass through the manufacturer and seller. in the form of Electrolux vacuum bags to the consumer! I had to stop using because I didn't want to damage my $1500 Vac! These bags should NOT be on Revain and should NOT be produced anymore! I contacted Revain to return the bags and get my money back. DON'T WASTE TIME AND MONEY. DON'T BUY, DON'T BUY, DON'T BUY!