They are not only the inner bag to protect the laptop, but also can be used as a mouse pad or a stand, with such a function, the luggage will be lighter, let people feel more free during the trip. We use artificial sheepskin fabric, different from the common PU fabric, it has a very comfortable touch, like touching the skin of a baby, but it must be noted that they are not real sheep leather; Soft is more than one side, we use a very smooth and soft velvet inside the bag, the length of the fluff is just right, will not tie, but can make the computer in a very soft surround.