A vacuum filter bag includes an inlet flange and gasket, a clamp positioned adjacent the inlet flange, and a plug. The clamp is operable to engage the inlet port of a canister vacuum when the filter bag is mounted in the vacuum and keeps the filter bag securely attached to the vacuum inlet. The clamp is also operable to engage the plug and keep the plug in place to close the filter bag inlet after use of the bag. The filter bag reduces user exposure to dust and debris captured with a canister vacuum.