"Combing hair periodically also helps to tighten up the wave pattern. Once you’ve mastered this process, you can then advance if you choose to change your pattern to a 540° or 720° one." ...

Combing hair periodically also helps to tighten up the wave pattern. Once you’ve mastered this process, you can then advance if you choose to change your pattern to a 540-degree or 720-degree one.' ...