Have what you are talking about. Just spent 3 night in the Linville gorge. First night it went to 18 and I was toasty with a blue pad I got at walmart in between the two layers. Used the modular military sleep system. I would post pics but don't know how to in threads. Double layer ripstop gathered end. Worked great! The pad did not shift at all. I don't have the $ for underquilt myself so I took a chance with a pad andI'm glad I did.