As part of a sofa bed, this has got to be the most comfortable bed I’ve ever slept in in 53 years of my life. When I first ordered, it came with a pillow type cushion to zipper in mattress, which adds extra comfort. If you leave open as an actual bed, never deflating, this will last “your” lifetime. I now use as permanent guest bed. It’s when you inflate, deflate many times that you need replacement. I highly recommend. In fact, I’m going to Google to see if they sell twin sizes for another room. *** My current guest said he woke up for first time not having back pain.*** I believe it, cause I’ve slept on it, too.