This two-piece pillow protector set is made of lightweight thin polyester with water resistant performance to shield inner pillows. A full-length zipper runs along the edge to fully enclose the pillow and prevent slipping out during sleep. The slim thin fabric layer keeps the surface pliable without bulky extra thickness. The polyester material supports machine washing for simple repeated upkeep. Sized for standard pillows, this protector set fits residential bedrooms and hotel guest room bedding arrangements.