The Universal Mattress Bag by Pen+Gear is designed to fit Twin to King size mattresses and protect them from dirt, dust, and damage during transportation or storage. Made of clear plastic, this water-resistant bag is easy to use and helps keep your bedding clean and organized. With dimensions of 78 inches in height, 100 inches in length, and 14 inches in width, this mattress bag is a convenient and practical solution for keeping your mattress safe and secure in your bedroom. Brand New Sealed!