What I have done in the past with several different closed-cell pads is to cut them nearly through (leave about 1/8" uncut) and into sections of the appropriate width and then duct tape the pieces back together to form a hinged, continuous pad. Only one side needs to be taped but you need to cut and tape alternate sides or it can be hard to fold it up. Your weight on the tape seems to "tighten" up the grip of the tape over time. Ray Jardine sells a kit with instructions for making a fold up foam pad. I don't know anything about it but it may be worth a look. Here is a link to the kit: http://www.rayjardine.com/ray-way/Sleeping-Pad-Kit/index.htm