R value to Tempperature

I found this interesting article about sleeping pads in general a while back… it is geared towards hammock camping and I find that there is probably about a 15-20 degree difference as to insulating value between sleeping on the ground vs in a hammock, but everyone is different.

http://www.hammockcamping.com/Free%20Reports/DWombleFoamPads.htm

It will at least give you an idea as to how they compare with each other.

Jeremy,

Dave's work will give you a rough ball park for hammock use but, his foundation premise is erroneous. All closed cell foams DO NOT have the same thermal conductivity for the same thickness as the Link Rest. At least eight types of closed cell foam formulations are used in sleeping pads and they all have different thermal conductivity values for the same thickness.

Stuart,

The OEM manufacturer's R Value spec. on this pad is 3.5. I let mine self inflate, sealed the valve, and then tested its R Value. It tested 2.8 on my prototype thermal tester. The R Value would be higher at maximum inflation but, the comfort would be poor. I only did one test rather than average a series of tests to provide the most accurate results. A sleeping bag that provided this same level of insulation would have an Extreme rating of ~38F.