Double knit polyester has long been a traditional favorite bottom weight fabric. Double knit is a stable knit with cross grain stretch of 12%. Great for skirts, suits, choir robes, tablecloths, and so much more. You can also use double knit as a affordable substitute for speaker cloth. Polyester Double Knit. 60" wide. 100% Polyester. Machine Washable. Black polyester fabric priced by the yard.