I love my buffs - but for the answer to this question, I'd specifically recommend the wool buff.
The wool buff is 2x as long as their summer buffs and is even more versatile while being even warmer.
2x as long as the summer buff?!!? Can it be worn as a dress? Wow...I cut all my buffs in half because they are too long for me, I can't imagine a wool one that is even longer.