Using 2 pads doubles the R value to 5.6 which in practice is usually sufficient for use in very cold situations (e.g. winter camping). It also doubles the weight of course, but these pads are very light. As to comfort, two are noticably more comfortable than one. Many years ago when I began using them I found one was quite adequate except in very cold situations (i.e. below freezing). Now as an old guy, far past 60 and with arthritic joints, I find two pads to my liking.
Date published: 2018-01-16