23" Wavy Hair Extension by Hairdo is a multi-level, one-piece, clip-in extension. Short hair becomes long and luxurious. Long hair becomes thick and full. These hair extensions are made with Tru2Life heat-friendly synthetic hair that can be flat-ironed, curled or blown out. Calling all drama queens! Get this super voluptuous 23" Wavy Extension for hair that's thicker, fuller, longer - and so perfect for stealing the spotlight.