So that is 2 layers of 5 oz CS, IOW a total of 10 oz. sq. yd. under you, correct? So that would be a CLO of .82/ozX10= 8.2.
If everything else is perfect- snug seal with no loft compression when you pull it tight(dif cut), there is a rule of thumb that says ( for top warmth in a sleeping bag) CLO of 2 = 40, 4 = 20 and CLO of 6 = zero. I suspect in real life in a hammock we need a little extra on the bottom for a variety of reasons.
Still, the CLO rating seems pretty valid. For me, 1 layer of 2.5 oz(CLO 2) has been fine under me in the 40s with no other warm clothing other than cotton jeans/tee shirt. And Cannibal took a CLO of 8 to minus 11F with some clothing layers. So you may have to get to MN or CO to test that bad boy!
( of course, it's that "all else being equal/perfect" that will make theories go awry. Evil drafts individual cold tolerance etc)
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