While this may be true at times, it does not always have to be the case. With proper equipment and proper setup you can be warm in just about any tempature that is survivable. After a few nights where I was not as warm as I would have liked, I decided to fix the problem.There still may be times when the gear I have with me is inadaquate for the current conditions and I have to suffer a little, good planning and preperation has kept those nights few and far between and freak situations where I didn't plan on staying out all night.