Tried a variety of pads. Every pad I've owned from my ground dwelling days. Thermarest, Ridgerest, Zpad and 1/4" ccf cut a bit larger than the ocf HH pad. Pads alone in a HH just were not the best solution. Haven't tried a pad in a SPE. Became an under quilt convert. Also prefer a quilt over a sleeping bag. About the only pad that didn't really slip around too bad was the ccf pad.