Help with washing dolls hair. What kind of hair do these dolls have?

I’m new to collecting Barbie and I started with these two beauties.

I want to wash their hair because it’s matted and frizzy but I’m not sure if I can do a boil wash on both of them. I’m 90% sure that Odette hair it’s the kanekalon version, but for Rapunzel i’m not sure which hair type she might have

And another question, is the crown on Rapunzel wedding doll removable?