I've used many versions of the basic design incl. Z-res, Ridge Rest, and a number of cheap alternatives.
I dislike how snow/water gets caught in the crevices of both Thermarest designs, so anything with a lot of creases and folded surface area is out.
It has to be dense; most "smooth-faced" pads are not dense enough to effectively insulate.
I am aware of the MEC and Gossamer Gear Thinlite pads in Evazote, and am considering giving either try.
I don't want a comfort pad, I want a pad for alpinism that suits my requirements. Suggestions (particularly those born of personal experience) with such products are much appreciated.
Thanks! Snowy