The Festool 204309 Longlife Filter Bag is a reusable dust extractor filter bag built for select Festool compact extractors. This is a longlife filter bag designed for collecting dry, non-hazardous dust, coarse chips, and debris in compatible Festool dust extractors. Model Number: 204309. If you run a CT 15, CT MINI I, or CT MIDI I and want a bag you can empty and put back to work instead of tossing after one fill, this is the upgrade.

What matters here is not just that it fits the machine, but how it changes day-to-day use. Festool builds this bag from high-strength, 3-layer polyester fleece, which gives it the durability to be reused instead of treated like a one-and-done consumable. Festool states it can last up to 500 uses, which makes it a practical option for users regularly picking up larger debris where a reusable bag makes more sense than constantly replacing disposable liners.

This Festool 204309 Longlife Filter Bag is best used for coarse chips and dry, non-hazardous dust. That makes it a strong match for cleanup after woodworking, general jobsite pickup, and shop maintenance where the waste stream is larger and easier to empty. Just as important, Festool specifically says it is not recommended for fine dust. That is a real-world limitation worth paying attention to, because using the right bag for the right material is what keeps your extractor working the way it should.

From a design standpoint, the reusable setup is simple and jobsite-friendly. The bag installs and removes quickly, and the sliding clasp design makes emptying straightforward. That saves downtime compared to fully replacing a bag every time it fills up. If your workflow involves frequent cleanout of shavings, chips, or larger dry debris, that convenience adds up fast.

Compatibility is clear and specific. This bag is suitable for CT MINI, CT MINI I, CT MIDI, CT MIDI I manufactured from 2019 onward, plus CTC MINI/MIDI and CT 15 dust extractors. That means it is built around Festool's newer compact extractor platform, so buyers should match it to the correct generation before ordering. If you are running an older unit outside that fitment range, do not assume cross-compatibility.

Who should buy it? This is a smart buy for woodworkers, remodelers, installers, and serious shop users who run a compatible Festool dust extractor and mainly collect coarse, dry debris. If your work creates lots of fine dust, this is probably not the bag to center your setup around. But if you want a durable, reusable filter bag for the right material and the right machine, the Festool 204309 Longlife Filter Bag does exactly what it is supposed to do without overcomplicating it.

Festool 204309 Longlife Filter Bag for Repeated Cleanup

The Festool 204309 Longlife Filter Bag makes the most sense for users who want to stop throwing away bags every time they clean up chips and other larger dry debris.

• Who it's for: Festool CT 15, CT MINI I, CT MIDI I, and other listed 2019+ compact extractor owners doing woodworking, shop cleanup, and general dry debris collection.
• Why it stands out: The reusable 3-layer polyester fleece build, easy-empty sliding clasp, and up to 500-use service life are the real value here.
• Worth knowing: This is not the bag to reach for if your main concern is fine dust. It is built for dry, non-hazardous material and coarse debris, and that distinction matters.

• Which extractors does this bag fit? It is suitable for Festool CT MINI, CT MINI I, CT MIDI, and CT MIDI I manufactured from 2019 onward, plus CTC MINI/MIDI and CT 15 dust extractors.
• Is this filter bag reusable? Yes. It is a reusable longlife filter bag with a sliding clasp for easy emptying, and Festool states it can last up to 500 uses.
• Can this bag be used for fine dust? No. Festool specifically says it is not recommended for fine dust and should be used only for dry, non-hazardous dust types.