Free: Contests & Raffles.
Merino wool and sitka have been my choice. I have both the ascent and mountain pants and dither would do well. They aren't the same material the mountain pants are slightly heavier material and not quite as.stretchy as the ascent but very minor differences. I would say microtex also if on a smaller budget. Or maybe the cabelas hunt tec. I started gearing up with sitka and firstlite last year and it still amazes me how might better I like that gear than anything else I've used. Its spendy but worth it IMO.