Review on 100-Pack TIDI 21" X 30" Blue Single-Use Pillowcases - Protect Against Stains And Spills - Medical Supplies (919363) by Chris Sisley

The price per Pillow Case is decent on these. The seams at the non-opening part of about 1/5 come apart with relative ease though, if you're using them for any significant amount of time longer than just placing your head on them for an exam. I use them for laying patient's arms down when drawing blood. If I fidget with them more than a couple minutes, the seams seem to come undone rather easily. Most of them, however, will hold up for your average needs. Recommended based on price (on Walmart) and the scarce availability of these online.