>>1387788>>1387791>>1387799>>1387860>>1388269>>1388274>>1388448>>1388443All of these suggestions are terrible. Kys.
>>1388439This is the correct answer. I have the Downmat 7 LW, which is a little less warm and a little lighter than the 9, but I find the LW version (long and wide) necessary for side sleeping comfort. Since I'll typically have my arms extended out in front of me and my knees bent, I need the extra width. These pads are thick, so your hip and shoulder don't sink through to the hard ground, like with thin pads.
I've never been cold due to my pad, but in retrospect, I probably would buy the 9 LW if I had to buy it again because it's only like 2 ounces heavier for a much higher R value and slightly thicker pad (although the 7 is a lot thicker than any Thermarest, and plenty thick for side sleeping). From their website, the 7 is rated for -11F and 2.8 inches thick, while the 9 is rated for -36F and 3.5 inches thick, but you lose a bit of insulation around your hip and shoulder, and the way a lot of people use these is to extend the temperature rating of a sleeping bag, so I use a 30F bag with the -11F pad and stay warm (all around) down to around 20F.