Pan, BBis. et all:
Speaking of apples/oranges and many variables in "systems" and the old "layering" concepts, I wonder if there is any advantage weight wise or warmth to thickness wise, to multiple layers in a sleeping system?
IOW, approach A = 2" of loft above you, and is achieved by a single quilt. Approach b = 2" loft above you, and consists of various pieces clothing plus a thinner quilt.
The obvious weight advantage of system B = multi use of items. Also more adjustability in warmer temps. But I'm also thinking of what I used to hear about more warmth from layers compared to one thicker garment, due to air layers trapped between the several different garments.
But, I suppose if there were trapped air layers, then it would show up in the thickness and if it was going to be any warmer than it would have to be a little loftier. And weight wise, multiple garments leading to equal thickness would require more shell material to insulation ratio. The additional linings and shells required to hold the various insulating garments together. Hence, there might be a weight penalty.
So, the more I think about it, weight savings from multiple use and adjustability are probably the "only" real benefits of a multigarment approach to sleeping warmth. Though that weight savings might not be as much as it at first appears due to extra shells and linings.
One last thought on "systems" for sleeping warmth: If you have had to travel all day in the rain/snow, and you have worked up a sweat on the uphill slog despite best efforts to avoid it, and now you are dependent on your wet or damp clothing for sleeping warmth as temps plummet? Oh well, there are just a lot of variables, aren't there?
Sorry, my mind is on a random wandering course here.
Last edited by BillyBob58; 06-29-2007 at 10:15..