What is R-Value, what value would i need for Winter Camping?

Dec 31, 2019
I use a aluminium layered thin pad under it too during colder seasons. It does "good enough" on its own but with an extra insulation layer it is much better.
Dec 23, 2019
I can guarantee you that whether you're comfortable with this pad in winter depends on your body, your gear combo, etc. I personally don't find this warm enough even in fall if I'm using a quilt. Contrary to what the ultralightists will tell you, having sleeping bag under you does help you stay warmer: only a very small portion of your bag is completely compressed indeed your body. I've augmented the warmth of this pad by laying a fleece throw or evazote pad on top of the air pad. In my mind, the air pad is for pressure-point comfort and the other insulation (bag, closed-cell foam pad) are for warmth. For the record, in my Therm-a-rest self-inflating days, it was still recommended to pair with a CCF pad in winter. The summary is that you have to try things out to figure out what works for you. If you have winter camping experience, you'll know how to test the limits; if you don't have that experience, you'll want to test this pad in less risky situations first.
Dec 15, 2019
I have used this mat (mine is over a year old) in January over a frozen ground and I could feel the cold. I think for winter camping a mat with a R-Value of 5 and up may be better, but I have not tried those.
Dec 13, 2019
I am very comfortable, insulation wise, in 3 seasons. Even with larger hips I don’t feel like it compresses enough to create a cold spot there. I have heard it recommended to use an R value of six for snow camping. For me, that just means throwing my Thurmer rest close cell foam pad under this and it works great
Dec 12, 2019
The specs say a R value of 4.4, but I think that depends on how you sleep. I am a side sleeper, & i (5'10", 200lbs) nearly compress it fully at my shoulder.