Chill out and stay chill, comfy and safe all night long with the Serta Power Chill 2-pack pillow protectors. Premium knit fabric offers an ultimate comfort for a cool night sleep. Each pillow protector features a knife edge design on all sides and a zipper closure. Highly advanced bedding treatments inhibit the growth of unpleasant scents to keep your pillow cleaner, fresher and more durable for longer. 3M Scotchguard stain release technology easily removes stains in the wash. Machine washable for easy care.