Dune Women's Heated Vest with Rechargeable Battery - 10 Hours Warmth | USB Charger Included | Machine Washable | Perfect for Outdoor Activities, Winter Sports & Cold Weather Commuting

Works great by itself or when needing extra heat. Does last for at least 7h on lowest setting which was all I needed most days.Truly made for athletes and for outdoors. Much better than ORORO or the fake Chinese copycat vests which feel cheap. This feels much warmer at a lower setting and feels like good quality gear.Cons: battery is fat and bulky. But so is all the other copycat brands.