I've used Thermarests for 40+ years, and still have the first one I bought! For winter and car camping I use a self-inflating model that's 25x72x2. It's ridiculously comfortable. I have no problems with side sleeping, and I weigh 210. Worth looking at, but there is a weight penalty. We use neo-airs most of the time and keep them together with some elastic straps we made up. The little extra room I need I steal from my wife's side. They are very comfortable for how light they are. Once again, they hold my weight up very well.