I wanted to update my sleep number bed to their latest model with memory foam so I replaced the top layer foam topper with the Dream Form Gel topper and I am so glad I did. Sleep number beds are comfortable to begin with but the Dream Form topper put my sleep time more enjoyable and comfortable. Why buy a new bed when all you have to do is change the topper! I have a bad back and this topper just cradles me. I can't find an uncomfortable position. The cotton cover that came with the Dream Form is well made. The cover comes with a zipper that goes all the way around the topper so it took me about 5 mintues to put it on instead of having to shove it in a store bought cover with only a top opening. The topper itself is very well made and the green tea scent is not overbearing. I highly recommend giving this topper a try if you are looking for more comfort or have a bad back.