The human body loses the most head from the hand, feet, and head.
Here are some accessories for winter travel that I recommend
In cold weather, you lose much of your heat through your head and neck - 30% or more! Why not preserve warmth by simply donning a winter hat?
Your hat needs to insulate and breathe well, to let excess heat and perspiration escape. Synthetic hat materials like Windstopper® polyester and acrylic knits stay warm when wet, as does natural wool. Also, look for itchless materials or linings, since a hat can really become uncomfortable without them.
A neck gaiter is a sleeve that fits over your head and covers the neck area like a scarf; however, it is better than a scarf since it has no loose ends and is snug. It can also be pulled up to cover the chin and the mouth when it is windy.
A fleece-lined facemask with breathing holes for the mouth and nose. This minimizes condensation which is bad on your skin.