The Coleman was the 3/8" thick solid foam. The 36 inch was simply
cut down from an old pad I had. I wanted to get some shoulder
coverage so I laid out the pads in a "T" shape. I use the same cut-
down pad to make one of my daypacks more rigid--a poor man's internal
frame pack, so to speak. When using the Coleman with thinner bags
such as a fleece bag, I find it causes my back to sweat which makes
for an initially shivery start to the morning if it's cold outside.
Did not have that problem with the Goliath.