Originally Posted by BillyBob58
Could you remind me what thickness CCF you are using when expecting below zero temps? Do you use a thinner section under the legs, or is it all the same thickness. I have only done ~ 18F with CCF pads, but it was one full length Riderest ( 5/8" ?) plus a torso length "Ultralight" inflatable stacked on top in an SPE. Toasty!
For subzero, I use 2 different ones. The wide walmart waffle blue and a section of the stiffer walmart blue pad cut to fit the width for my torso. Not sure of their actual thickness 1/2 and 3/8 I think. I also hang my poncho underneath as an extra windblock and put my pack liner garbage bag in it as a garlington insulator. I sometimes add in the sunshade reflector pad for the years when I haven't gotten accustomed to the cold yet. If the temp is expected to be significantly below zero, I may bring an additional 3/8 ccf for ease of mind as -20 is nothing to mess around with especially when on a solo trip 5 miles in. CCF is bulky but light.