Also known as an inflatable air mattress, this is an anti-bedsore mattress that assists users with pressure ulcers. Ripple mattresses are manufactured as part of a hospital bed or entirely on their own. It is designed to lower the interface pressure between the patient's skin and the support medium. Doing so makes it easy to achieve its goal of relieving the stress from the patient's weight on the mattress. It lowers the pressure by providing uniform support through the patient's contact skin with the help of the air, which pressurizes the air cushions. Sometimes it is called an alternating pressure mattress.