Let me introduce you another good thing, if you say: sometimes your stomach is really uncomfortable, put a pack on your clothes, it will be very warm! I bought the mini version of the warm baby. It has many kinds of warm babies, stickable and non-stickable versions. Before you place an order, be sure to check it out, or you won't regret it after receiving the goods. I think it is an artifact in winter, it is worth recommending