The battery feels a bit heavy, but it's very warm. (It's warm even without the battery.) The jumper is XL and has a relaxed fit. It's the perfect size to wear over a shirt, sweater, or work clothes. The battery is stored in the pocket around the lower back. I think it's good for outdoor work, fishing, etc. The item includes the charger shown in the photo, so you can use it right away. Please consider this item with the understanding that it is a used item. ① The jumper has been worn about 20 times without the battery. ② The adapter is new (with box), and the charger is almost new. ③ The battery has been used only for testing, but as you can see in the photos, there are almost no scratches from use. The temperature can be adjusted in three stages and on the front and back. Color: Black Pattern/Design: Solid