PREVENTS AND TREATS PRESSURE SPOTS AND BEDSORES: The 5 alternating pressure mattress helps to manage and prevent ulcers, pressure spots, and bedsores. With 16 sealed air chambers and a variable pressure pump, this mattress topper helps to prevent pain and pressure for those who have limited mobility or are bedridden. CUSTOMIZABLE FIRMNESS AND PRESSURE: Adjust the settings of your mattress pad from soft to firm depending on your personal preferences. The air pressure can be easily customized with the use of the air pump dial, for a more personalized experience. QUIET ELECTRIC AIR PUMP: The variable pressure pump is quiet enough to ensure a peaceful night of sleep. With an easy-to-adjust dial, you can also monitor the air pressure firmness on the included display to keep settings consistent.