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A double-rub is a testing method that uses a special machine that passes a testing pad back and forth over the fabric until it is worn out. Each back and forth pass is known as a double-rub. Commercial grade fabrics usually wear out after 100,000 to 250,000 double-rubs. Domestic fabrics are usually rated at 25,000 double-rubs. You can’t visually tell how well fabric will hold up until it has been tested.
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