REVLON Primaflex Hair Extensions Frosted PrimaFlex™ Extension by Revlon is an 18” ready-to-wear hair extension that adds length and volume in seconds. A flexible weft allows the extension to lie smooth and flat on the head, making it comfortable and secure. This one-piece extension is lightweight, stylish, and versatile. With the heat-friendly fiber you can change the look using your favorite styling tools. New never used. Open box.