This filter comes as a single filter, and it can be rinsed, air dried, and reinserted into the vacuum. This should be done once a week to once a month depending on your use of the vacuum. Make sure filter is 100% dry before reinserting. The foam filter should be replaced once it starts to wear down. This will keep your backpack vacuum performing at its maximum capacity.
Please take a look at our full line of vacuum filters for more ProTeam vacuum filtering options.