Foldover elastic is an easy edge finish for diaper covers, necklines, waistbands, and blankets. Makes cute headbands and hair accessories too! Foldover elastic, or FOE, is elastic that has a fold line down the center. Simply fold it over the raw edge that you want to finish and sew it on. Stretch as you sew to gather the edge, or sew as is to cover the edge. Wholesale FOE here.