Thanks for all your views and expertise, very helpful. My personal hiking habits may be part of this matter, as a routine, I always change my clothes when I set up camp at the end of the day. Its a habit, a personal hygeine routine and the belief that it's better to sleep in dry clothes rather than damp, sweaty and possibly smelly ones. I also accept that my Neoair may have played its part, I'll experiment with that. Socks maybe, but I've never experienced cold feet, my quilt is really padded well at the feet end. I'll think of ways to improve my lot but I've decided to stick with the equipment and clothing that I already have. I've already got too much stuff, mostly mistakes and do not want to add even more unless I feel it's essential.