Elastic Cord Trim is ideal for keeping waistlines tight and garments ruffled. Elastic cord trim can be made up of cotton and/or polyester fibers woven together, surrounding rubber or elastane. Elastane is a synthetic fiber that was invented in 1958, and rubber is created from an organic compound, and has been used for thousands of years. Either way, elastic cord trimming is often utilized for its stretch. From creating ruching on a prom dress to ruffles on a throw pillow, elastic cord trim is a functional and fashionable trim.