Would the NeoAir perform well on winter nights down to 10-15ºF without another pad underneath? I'm sleeping in a tent and I've got a down bag rated to -10ºF, but I sleep on the cold side. I probably "should" buy the Prolite Plus but I just tried this one and it's SO light and cushy... has me wondering whether I could get away with it in the cold!

I absolutly love this pad. My wife got this for me last Christmas and we took it to Guadalupe National Park. The temp was easy 15 degrees F and I slept like a baby... well until I was woken up and asked to trade pads... Bottom line, you cant beat the weight or the comfort of the neo. If you get cold, toss a few hand warmers in your bag.

I agree with everything Livingston said, just a few things to add. I'm not an expert in R value, just experience, and it seems in the sub 20 to below freezing range there is a lot of opinion on the neoair. Some people (myself included) sleep fine around freezing on the neoair, while others recommend a pad underneath. I think a big play on this is the sleeping bag the person has, as well as the inflation level of the pad. Keep in mind, while some like to underinflate the neoair for some more comformity and comfort, this decreases the distance between you and the ground thus decreasing insulation level, if it's cold, the neoair needs to be fully inflated. And it's always important to have a sleeping bag rated correctly. I've never gotten in to R values, generally, in the colorado rockies (san isabel range) the general backpacking rule was over 2 inch thick for a pad below freezing and yer good. The neoair, fully inflated, with a -20 down bag, inside my Nemo Moki tent, has kept me toasty in -5F. Hope this helps.

Thanks, that's helpful! I think I'll try it out with a Z-Lite - I'm pretty amazed at how comfortable it is... Slept on it last night in my living room and feeling well rested today! Do you know what minimum temperatures different R-values correspond to? I tried googling for a chart but apparently my googling skills aren't up to snuff. Thanks!!

Because the R-Value is at 2.5, I wouldn't recommend this pad for anything below 20 degrees F. You will really start to feel the cold coming through below this temp. One way of combating this is by using a closed-cell foam mattress like the Z-Lite or Ridgerest. Both of these pads will raise the R-Value past 5 which is adequate for around the 0 degree F mark. These pads are light and fairly inexpensive and are indestructable which is important when you are in cold environments. The Prolite Plus is also a great choice. It's limit is around 10 degrees F (for an average warm sleeper) and packs pretty small.