Many of us have aspirations of wearing a protective covering overnight for protection and coil-keeping, but may have trouble remembering, or simply keeping it in place. A satin pillowcase solves this problem! Sleeping on a satin pillowcase is not only luxurious-feeling, it's also one of the simplest and most effective changes you can make to your hair regimen! Compared to cotton, sleeping on satin helps your hair retain moisture, maintain curl/coil definition, and protects your style from day to day. It can also help protect against split ends or damage from friction through the night. Our pillowcases are polyester satin, and each one has a hidden zipper to keep it from slipping off your pillows. (the zipper is very important!) Price is for single case, standard size. Give it a try and you will be shocked you haven't tried it earlier. Retain moisture, protect your ends and coil definition, and sleep without mussing your styles.