The messenger bag is closed by a large bag cover, and the middle bag contains an electric brain (it can store a laptop computer of 15.6 inches or less). There is a small insert bag and a waterproof zipper bag in the front of the bag, and one insert bag on each side of the main bag。The unique reflective canvas fabric can not only prevent water from splashing, but also make the bag stiff and shaped, and there is a small waterproof zipper bag outside the front piece, which can protect your contents。so that you appear particularly unique in the crowd has a personality.