If I could give this pillow protector a Minus stars I would!! A reviewer wrote how it holds air and I Wish I would have listened. Instead I purchased the package of king size pillow protectors and it was like laying my head down on a over inflated balloon that gradually deflates and starts to suck all of the air out of your pillow along with it. HORRIBLE!!! Also has a scratchy sound!! I was left with my head laying on a scratchy sounding flat pancake pillow till I got SO IRRITATED I got out of bed and switched pillows in the middle of the night. 
Maybe if you’re a germ a phobic these covers will work for you…..