The new Self-cleaning Filter Bags for the CT MINI dust extractor are made of a unique pliable fleece that prevents caking so that the dust extractor continues to deliver full suction until the bag is virtually completely full. The Festool filter bag also serves as a pre-filter and is able to trap dust particles down to five millionths of a meter, or 5 microns. By arresting these small particles, in addition to larger chips, the bag extends the life of your main HEPA filter, reducing wear and tear as well as the expense of frequent filter replacement. Bag disposal is quick and mess-free. An integrated closure on the bag shuts the opening to prevent spilling. The material is made to be tear resistant and prevent bag blow outs. Includes five (5) bags.