@villainousfriend It was a lot more pleasant to sleep on than I thought it would be. I expected it to be slippery and maybe a little sweaty, but it felt cool and pleasant.
(I'm sure the material is not actually silk, it's just something synthetic with a similar texture)
I don't know if my curls are any more preserved than they are when I sleep on my normal linen or cotton pillowcases, but they're not any worse