Ok, I can't believe I have never heard of this! Apparently this is what you should use when your hair is blown out and you want to keep it smooth/frizz free while sleeping?

Makes sense. I just can't believe I never knew this! A couple questions because I have been looking online. Is the pocket flap or zipper better for the pillowcase? I'm assuming zipper? Also does the pillowcase color matter (I know this is probably a stupid question, but you never know)? It doesn't matter if I get a color, right?