Which silk pillowcase?

I'm looking at silk pillowcases. You can get them in white, cream, red or black. Different qualities of silk. Or silk on one side, for the top, cheaper cotton underneath.

I've also looked at cushions. Cushions and pillows with embroidery look good but I find you need a flat surface under your face. So you could have the raised pattern on top during the day, turn over to the plain side at night. Or use the cushion or oversize pillow merely for decoration in the daytime, perhaps on top of a white cotton pillowcase on a second pillow.