Of course, I think I poked a hole in my thermarest on the cave rocks within the first hour of being in there.. slept on a flaccid thermarest the rest of the time I've since gone back to a z-lite when I'm not in a hammock. it may not be quite as cushy as the prolite, but usually when I'm on the ground I'm in places that are somewhat inhospitable to inflatable pads - and I'm tired of chasing holes (unsuccessfully) with a patch kit in the backcountry.