Stop in for a cup of coffee

Any one ever use a heated vest/jacket thinking of getting the daughter one since she works outside all year. Something like this.
Men Women Battery Included Electric Heated Vest Cloth Jacket Heating Pad Warmer | eBay
Buddy and his wife have them, no idea what brand, but they are very happy with it, both ride motorcycles and say they are very good on chilly days. They also wear theirs in winter.