The Serta 18 Perfect Sleeper ECOAIR Raised Queen Air Mattress is engineered to retain its firmness without the use of a continuous pump. Our proprietary and patented 4-Comfort pump allows the user to adjust the firmness of the bed to their own taste. The Firm Edge Technology provides superior outer edge support that wont dip. With a setting for Plush, Medium, Firm and Extra-Firm, the Serta ECOAIR Queen Air Mattress provides every person the ability to achieve the best night of sleep. Given the super-soft Slumber Touch top, this mattress provides the look and feel of a traditional mattress, easily transitioning this to serve as a bed in any sleep space.