I bought this big box of bags in April, 2011 and have only gotten part way through it, the cost per bag was only 36.5 cents per bag and the price as of June, 2014 has dropped to 36 cents per bag, if you can absorb the initial cost this will save you a lot of money over the long haul, the manufactures name brand bags had gone through the roof for price and my wife was buying vacuum bags from the grocery store, it was costing around $1.00 per bag at the grocery and the cost has gone up since then, These bags are as good as any we have bought in the past, they have never broken in the canister while in use, and don't allow dust to leak into the vacuum cleaner canister (great dust filtering). buy them and you won't regret this purchase.