Alright, I'm considering picking up a Buff headpiece, however my extremely minor dilemma is what fabric to chose. I typically backpack in the year in the Gila Wilderness in NM which has pretty warm temperatures mostly consisting of cool evenings (30's-40's) and broad ranging days but typically 'warm' (50's-80's) with lots of sun.
I really enjoy and prefer Merino wool and the newer Merino Buff is my first choice however I'm concerned that when worn as a head band I'll heat up real quick, but it seems from the description that the Merino Buff is quite thin and may be perfect for a broad range of temps. I like the Coolmax version for daytime use but my question with that material is will it provide any warmth when the temps drop and I need some light insulation for my head? Also, can anyone vouch for the Original Buffwear fabric, the microfiber version?

