What kind of hair does Obitsu use?

My Obitsu girls are both a little sparse, and I'd like to add a little more hair, but I don't know which kind to get. All I know is it isn't kanekalon. Does anybody know whether Obitsu uses nylon or saran?
Where no dollieh is left behind.
https://w.dolliehsanctuary.com/sanctuary/
https://w.dolliehsanctuary.com/sanctuary/viewtopic.php?f=41&t=13126
SetsunaKou wrote:Obitsu uses nylon.
SetsunaKou wrote:Yes, saran and nylon are very close. Saran is a bit softer and nylon is more stiff but the 'shine' and look are about the same.