Zippered for a snug fit in Queen and King sizes. Perfectly safe in your washing machine even with bleach, our protectors will come out of your dryer just like new, soft and ready to go back to work protecting you and your family in supreme comfort. A blend of 20% cotton and 80% polyester, you can be assured that our protectors are "breathable" will wear like iron, retain their downy softness, and never shrink or pill. Made to last they will keep their beauty and hygienic properties for years to come. Welcome overnight guests