I made my own balaclava following the idea posted above, with a polyester undershirt short sleeve. I did not sew the crown top.
PRO 1:
it kept me nicely warm at night, since generally 90% (CORRECTION EDIT 10%, not 90%) of heat loss is from the head.
PRO 2:
in the morning, I used the rag to dry out the condensation from the fog.
CON 1:
make sure you warn your camp buddies that you are wearing this. You will look like a bank robber or a psycho killer terrorist. because your bicep is smaller than you head, it reshapes your fat face, and you look insane. makes for good laughs and photo ops. I will not post my photo. be careful you do not get stabbed or shot if you forget it on your head and surprise someone with it.
CON 2:
wilderness mosquitoes can still bite through the thin stretched sleeve on your head.
Your friends are scared, but the bugs are fearless.
I like this MYOG. it is very functional, very cheap, very ghetto. I like it.