Steve patiently walked me through every option and told me all about not only the DualTemp, but also helped me find my sleep number and answered all my questions without hesitation. Steve isn't your typical pushy salesman. He knows that once you give Sleep Number a try for yourself you will be sold.The Sleep Number DualTemp layer is similar to a mattress pad that actually uses active air technology to heat or cool each side of the bed so you can chose your ideal temperature with the touch of a button! It distributes the temperature evenly for head-to-toe comfort! It features ActiveAir technology, which means it's breathable so it's not like a heating pad. It contains comfort layers that cushion you and has a timer that can be set to automatically shut off when you chose -- from one to nine hours. You can see the little pump here that does all the work. It makes very little noise -- I would qualify it as white noise, which many people use to sleep well anyway. If you were bothered by it, Steve explained that it can be set up at the foot of your bed as well. I didn't notice the soft noise at all until it was brought to my attention.