They don't supply them. I asked if they had restrictions and they said anything was fine. The plastic ones feel gross to me, but I hate to spend so much on something that will be used such a short period of time. I didn't think about a king sized pillow case fitting on there. That's a great idea.
Laura, mama to Henry 01.28.07; Catherine 09.01.11
always missing Jack, 08.23.10
& newest addition Audrey, 04.15.14