The other night I was out in a WBBB 1.1 DL, MWUQ, HR and Stealth on top of me. I left my tarp in the skins because it was a clear night and the sky was awesome and it was not very cold (20F) and minimal wind. At first I also had a z-rest ccf under me as well however I had the familiar coolness right under my butt that I have had before. I was actually inserting the z-rest to fix this issue. I knew the air temp at this point was about 35F so I couldn't believe it. I removed the pad and the coolness went away. I was puzzled. Is there something about the ccf that interfered with partnership between body heat and down? I don't know but it got me thinking.

I would like to extend the range of the stealth as an UQ and have the z-rest and a diy neatsheet UQ to use. I carry the short z-rest anyway so am trying to get more use out of it. In conjunction with the BB how much temp extension do you think the z-resta and the NS will provide? Is it best to layer body, z-rest, stealth, neatsheet? or is there another order that would be better? thought?

1/8" of minicell ccf boosts my underquilt low by 20+ deg if i had to guess. you don't need much of a pad since the temp of the inner shell of the uq will be fairly warm compared to the outside uq temp.

1/8" of minicell ccf boosts my underquilt low by 20+ deg if i had to guess. you don't need much of a pad since the temp of the inner shell of the uq will be fairly warm compared to the outside uq temp.

so you have found that the ccf and down work together well? I was wondering if the ccf barrier would stop my body from warming the inner shell and there might not be a warmth benefit.

What about about a breathable shell, like neatsheet, on the outside of the down, anyone use that set up for extra warmth?

Could you have been introducing an air gap that wasn't there before?

Curious as well,
Acer

Could you have been introducing an air gap that wasn't there before?

Curious as well,
Acer

Yea, the UQ has to be JUST touching, Possibly the CCF pad somehow caused your UQ to gap, In my experience, even a gap as little as 1" can give you "Cold butt". My ccf pad is the insert for my OHM pack, & easily adds 10 degrees to my set up, but it only fits from waist to shoulders. Just enough to take the edge off.