In order to prevent the baby's feet from being exposed, and at the same time can continue to use as the baby grows, the intimate design of the daughter-in-law buckle is used. In addition, the cuff can be opened and closed through the zipper design. These small details can show our pursuit of long-lasting functionality. The materials used are also very particular. 90% white duck down and 10% white duck feather are used for high warmth. At the same time, it is equipped with a convenient storage bag and the cap can be removed.