tabby - a neck warmer ?

I' m new to bowhunting (not going out this year, but getting ready for next year) I' ve gun hunted for years and I always freeze. I have an injury to my left hand that almsot causes it to get cold in 50 degrees. My feet freeze too. I figure the more heat that I can keep in me, the better off I am .....

Can you provide a link or other contact info for " neck warmers" ?

Thanks in advance ............


Patrick