Simple pillow protectors.  Cotton, breathable, washable. Easy to put on, easy to remove so you can wash as needed.  Protector does the job well however there are several in the package in the event you feel froggy to change the cases more often.  I appreciate that there are several in the package for this reason.  A great price for several simple pillow protectors.  If you are looking for something waterproof, to lock your pillow in tight it can't breathe, to keep your pillow's bad dreams away, or hide the pillow from it's friends, then this isn't the pillow protector for you.