Battery not included. Heated battery powered vest The Power On Puffer Vest is a stylish and functional wardrobe piece for men in size Large. This black vest features a silver metallic lining, adding a touch of sophistication to the classic puffer style. Made of durable nylon with polyester insulation, it is perfect for casual occasions and outdoor activities like walking. The full zip closure and solid pattern make it a versatile and trendy choice for men looking for a practical and fashionable piece to add to their wardrobe.