^ I've got the same bag 
- do you happen to know the r value of the Karrimat pad?
I consider myself on the warm end of the sleeping scale, but if I'm going to be in or close to temps of the Lithium (0 F), I want at least r 5 worth of insulation under me. I've got a neo air (r 2.5) that I'm adding a ridgerest solar pad (r 3.5) to, which should be adequate to 0 (or maybe a little below)
- do you happen to know the r value of the Karrimat pad?I consider myself on the warm end of the sleeping scale, but if I'm going to be in or close to temps of the Lithium (0 F), I want at least r 5 worth of insulation under me. I've got a neo air (r 2.5) that I'm adding a ridgerest solar pad (r 3.5) to, which should be adequate to 0 (or maybe a little below)