A powerful wet/dry vacuum to pre-vacuum the upholstery before cleaning. The machine converts detergent solution into a dry dense foam with only 10% moisture. The unique brushing head, with counter rotating brushes and foam control switch, loosens, breaks down and traps the soil. And because the foam is low-moisture, it only penetrates the fabric and not the backing materials. Once an area is clean, the built in vacuum removes the dirty foam and most fabrics are dry within 30 minutes.