Heated gear, even gloves, can easily go over 150.00 if you don't already have the heat controller.
Then one day, I was walking through Menards, a hardware store for those who don't know, and spotted a $15 dollar 12 volt fleece blanket that you could plug in. Little did they know, I would cut this blanket apart to get the wire out to use for something else.
This is my thermal insert, made by Tour Master. I sewed additional fleece at the ends of the sleeves, because it just wasn't made long enough for me, and the fleece fixed that part. Now that it's getting into the low teens and single digits, it's time for another weapon, something a little warmer than I can make myself.
Another appealing feature about the draw of this system is approximately 40 watts. That is very close to 3 amps. I have a 28 amp alternator on a 1991 ST1100, so there can't be a lot of accessories to tax the available power.