I need a fairly lightweight underquilt for my thru hike next year. Currently I have a ENO DoubleNest as my hammock. I slept out last night and the temp got down to 40 and even in my 20* sleeping bag, down coat, and ColdGear tights I was chilled. Now I know I need a pad and that would help. Just being as cold natured as I am I need something more. Any suggestion would be appreciated.