Air flotation is overlay can be used for clients who are at risk of skin breakdown, or have an existing ischemic ulcer. The mattress is divided into sections that can be independently adjusted for optimum pressure distribution along the whole body. An Air Floatation mattress is available as and Air Floatation 3 which comprises of 3 Air Sections and a Foam End or an Air Floatation 4 which comprises of 4 Air Sections and no foam end both overlay mattresses make up the dimensions for a single bed.