I've boiled her side curls (where the orange is) and I boiled the back piece straight. The curls on the side didn't hold as well as I had hoped, but I also removed my curlers earlier than I normally would. The back piece would most likely curl with a boil perm, since it feels like saran; it took beautifully to straightening when I did it. But it's really thick and heavy, which sometimes tends to pull a curl down over time. I use a light mousse in Lagoona's curls, which helps it keep, but I know some people don't like using product in their doll's hair.