-Your pillow without a pillowcase
-A PRINTED T-shirt (long or short sleeve, no polos or other kinds of shirts, hoodies, etc) which can fit on your pillow. Old ones you don't wear, old ones you like but don't wear, or ones you get for free in promotions/events are recommended, you just don't go buy a new shirt for a pillow.
Step 1: Instructions
Step 2: How It Works
Step 3: What is recommended, and for those embroidered and/or appliqued shirts, or with any other decoration method
Step 4: Now you know.
This is also a good way to make your own pillowcase without sewing.