Heated Jacket
This website gives you a great information on Battery Operated HeatersBattery operated heaters can also be worn as a jacket. This heated jacket can be worn anywhere at anytime. They can be worn for outdoor activities such as biking, camping, hiking, skiing, hunting, golfing and fishing. The sizes provided are small, medium, large, extra large, and double extra large. All you need are the batteries to provide your body with warmth. These batteries are stored in a small pocket like case. They are as big as a deck of cards and will not take much space.
The jackets heat comes from micro-thin bundled carbon fiber. You can heat your back and chest. Since this is a jacket it can be worn in wet conditions and provide heat for your body. There is no worry of shocking yourself when everything is protected by a tough wicker polyester plastic-coated exterior. The jacket features heat on three levels and with two room pockets to store keys or a phone. They also feature water and wind resistance with a soft lining and a front which zips to trap heat.
A standard 1 x 6 AA battery pack is used to supply heat to you so you can feel comfortable in any cold environment you decide to live or visit.