King size Sleep Number dual temp layer

I pulled the description directly off the Sleep Number web site. We are selling this only because we upgraded our bed and it now has this installed on it. DualTemp™ layer - Factory Outlet. It's a new degree of sleep. First we individualized your comfort with the SLEEP NUMBER® bed. Now we're personalizing your temperature with the SLEEP NUMBER® DualTemp™ layer an extraordinary temperature balancing layer that can be added to any bed. It features active air technology that heats or cools each side and allows you to select your ideal temperature at the simple touch of a button. So you can both have your sleep experience exactly the way you like.