The Herida Grampian II is an economical mattress overlay system, designed for the prevention and treatment of skin breakdown / pressure ulcers development. Its construction is made from 18 transverse cells, which are 5 inches in height (or 115mm), meaning it should be placed on a standard hospital or basic mattress system, for appropriate use. The cell inflates and deflates in an alternating pattern, being that of a one in two visual process.