The Vicair® 415 replacement mattress has been designed for patients who have a highly increased risk of Pressure Ulcers, and for patients who have existing Pressure Ulcers stage 1, 2, 3 and 4. The specially designed compartments in the mattress or inlay shell are filled with hundreds of Vicair’s innovative individual air cells, called ‘SmartCells’. These SmartCells™ have low surface friction, which allows them to move easily against each other and to conform precisely to the body’s contours. The exact number of SmartCells™ in each compartment can be adjusted to optimize pressure distribution, positioning, and envelopment in the support medium. Cells may be removed or added easily for proper immersion where necessary.