I tried the sewn on UQ. as i later read in the forums here, however, some say that the layer you are laying on will stretch, possibly compressing your insulation in between the bottom layer. At that point i realized why I was feeling cold butt syndrome with 6oz of climashield apex under me. This was on a gathered end hammock though. Maybe different on a bridge. I removed the outer layer and insulation and made an UQ. Been warm since. Hope this helps.
"It's better to keep your mouth shut and let people THINK your stupid than to open it and PROVE it" - SFC Kagawa, United States Army (my old platoon SGT)
*Originally -Abraham Lincoln 16th president of US (1809 -1865)