Double rubs term is a measurement of fabric abrasion resistance derived through a mechanized test called the Wyzenbeek Test which tests the fabric until it is worn down. The higher the count the more durable fabric.Commercial grade fabrics are usually rated at 100,000 and up. Residential fabrics for every day use are usually 25,000 and up. If your upholstery fabric is below 20,000 it is designed for light use and will not sustain everyday wear, especially if you have pets sleeping on your upholstered furniture.