Ofcourse there already exist electrical heated vests, undersuits and wetsuits:

http://www.heatedwetsuitreviews.com/

And someone invented (sailing)gloves heated with your breath:

http://www.youtube.com/watch?v=Z89zi0nkpnY&feature=g-upl


ronald
RAIDER-15 (homebuilt)

hey boy, what did you do over there, alone far out at sea?..
"huh....., that's the only place where I'm happy, sir.