Okay.....guys, go ahead and laugh but I do know my survival stuff well. [8D]
I have two pairs of AF survival wool pants....regardless of where they come from wool unlike cotton retains heat when wet! Do not underestimate wool as a survival fabric for infield clothes.........

Regardless of all the Hi Tech BS we are taught now, and that we " Have" to have.....NOT!!
If hunting in high Mtn areas, or areas that the climate changes quickly wool will even wet, stay warm! This is old school but important....there are many " fleece" garmets out there that are perhaps better. However I guess although I have alot of this stuff and have tested it.....I still have to go with wool..... Old fashioned I suppose.
P.S If you are a climber...my suggestion is to check out some of the things in the new Patagonia Cat.....