Bruno, I don’t think your pad is thick enough for camping on snow or somewhere towards -10. Did you try this already? I see you are young and strong and for a night this can be done for sure, but R-value 3.2 is not winter - even though it's said it's suitable.
The Thermolite: I wouldn’t buy it again, so, now that it’s here, well: it adds perhaps a bit of warmth, but my experience is: if your bag isn’t suitable for the cold the liner won’t do the rest… no, you can’t just summate the degrees together and it’s for sure far away from the announced whatever adding degree… besides it develops a strange smell quite easily (even though wearing long quite fresh clothes) and it’s electrostatic.
It’s quite flexible so you don’t feel cramped in it – but the old fleece blanket gives more warmth, well, weighing a bit more (I think it's something like 600 g), it just doesn’t stay in place so I would try a cheap fleece liner with zipper for opening as a blanket if you don’t want to spend a lot of money for occasional winter fun.
And unfortunately I must say that aluminum blankets don't insulate the ground or I just can't feel a substantial difference.
Last edited by Kokanee75; 01-09-2017 at 02:58 PM.