Thin and comfortable, but not infalible.
The vest is light and thin and does heat up pretty quick. (2-3 mins)<br /><br />Over a couple of layers of clothing only the highest setting can be felt.<br /><br />The heat is very centralized to the vest and it won't warm up your chest or all your back. However, it can give you the little push that you need in order to keep working or hiking if the cold gets to you.<br /><br />Is not by far an infalible solution to cold, but if you work outside or like the outdoors a lot, it can make your shift or adventure a bit more comfortable.
Rating: 4 stars