They are lightweight and are made of blended wool which is both durable and good at heat retention.
You can recharge their batteries thereby saving on the cost of battery replacement.
They come with side pockets for holding the battery packs which is good for your comfort.
You can adjust their heating temperatures to your preferences.
Their batteries are long lasting and so you can use them for lengthy activities like hikes.
They cannot be used in wet conditions as they are not electric-shock proof.
They are not machine washable.