Our sealed fabric bag units incorporate a two-layer disposable fabric bag for superior filtration. The bag has an inner liner which adds longer life, as well as more strength & resistance to bursting. This liner also serves as an electrostatic barrier. These fabric bags are inexpensive and can easily be changed, making vacuum maintenance easy. The fabric bag unit has a unique baffle system, which maximizes the useful filter area of the bag, providing large dirt capacity and maximum performance.