The technology in Neuma recognizes the unique sleeping needs of every individual, which vary according to comfort preference, body type, sleeping position, and other health and lifestyle factors. By creating a fully personalized sleep surface, your new Neuma mattress offers you customized comfort that can significantly improve your sleep quality. One has many reasons to alter the firmness of their mattress; It could be strained muscles, back pain, weight change, pregnancy, new sleep position etc. Since no two body types are the same, each sleeper should find their own comfort level. The dual adjustability of this mattress empowers you with the ability to personalize each side of your Neuma mattress. We thank you for your purchase and wish you years of personalized comfort and restful sleep.