@nannette I was using the "single" wedge for a while. But, I really was NOT very comfortable. I kept getting a pain in my hip if I slept on my side. When I saw on this forum there was one for the whole bed that you put under the mattress!!, I was so excited. I bought that, and we put it under my mattress. I was SOOOOO much more comfortable. But, my husband doesn't like it! LOL He complains he slides down to the bottom of the bed. I told him, "Too bad! I can finally sleep comfortable again after 4 years! Give it 4 years, maybe you'll get used to it!" LOL But I have now found, I am going back to sleeping on my stomach. I'm hoping the incline will reduce the silent aspiration if I still have that. I am very happy with the whole mattress incline.