A. This style of backpack is designed for business commuting and daily use by college students, combining practicality with a sense of fashion. B. It is made of Oxford cloth and has a variety of practical functions, such as breathability, water resistance, wear resistance, anti - theft, shock absorption, and load reduction. Among them, the water - resistant function reaches the splash - proof level. Even if it suddenly rains lightly, you don't have to worry about the items inside the bag getting wet. The wear - resistant feature ensures that the backpack can withstand friction and collisions in daily use and remain in good condition for a long time. The anti - theft design provides protection for your belongings. The shock - absorbing function can effectively protect the items in the bag, especially valuable devices such as computers. The load - reduction function makes it easier for you to carry the backpack and reduces the pressure on your shoulders. C. In terms of design, the overall style leans towards business commuting. The pattern is a simple solid color, combined with popular stitching elements, showing a simple yet elegant sense of fashion. The lining of the bag is made of polyester fiber, which is strong and durable. Its carrying system uses curved shoulder straps that fit the curve of the human shoulder, further enhancing the comfort of carrying. D. The backpack has a capacity between 20 and 35 liters, which can meet your needs for carrying items during daily outings and business activities. It also has a cross - body function, allowing you to adjust the carrying method according to different scenarios and personal preferences. In addition, it can hold a 15.6 - inch computer, which is very suitable for business travelers to carry office equipment and can also meet the daily learning needs of college students. Whether for daily use or business travel, it can be your reliable companion.