The body part everyone forgets until it's too late

[Alan]

"Your neck" Everyone focuses on hands and feet but if your neck's exposed you're gonna be miserable. A good neck gaiter or buff is worth ten times what it costs. What body part did you learn the hard way to protect in cold weather?

 

[Seaman]

You think you are warm enough until the cold reveals the truth. For me, it was my lower back. One gust of wind and the rest of the hunt was awful.