✅【Waterproof Function for Sudden Rain】Waterproof performance is ensured by thinly coating PVC on nylon. This PVC itself is widely used as a waterproof material, so the business backpack does not allow water to pass through the fabric and can maintain its waterproof performance for a long time. This material is also known for its ease of care. Furthermore, all the zippers on the exterior are water-stop zippers, effectively preventing rainwater from entering. (※This is not completely waterproof.) ✅【Excellent Usability】There are many pockets, both small and large, making it easy to sort and take things out. A 15.6-inch PC or tablet goes in the dedicated PC pocket, small items like notebooks, pens, and wallets go in the sub-pocket, documents, A4 files, and clothing go in the main pocket, and folding umbrellas and water bottles go in the side pockets. You can easily carry all the items you need daily. The main pocket opens wide, about 75 degrees, allowing for smooth access, and it's a stylish backpack that can hold a lot. ✅【Comfortable to Wear】The backpack body weighs only 0.8kg, making it an incredibly lightweight type that you won't even notice. In addition, the straps and the entire back are designed with ergonomics in mind, using thick cushioning and highly breathable mesh material, which reduces the burden through a decompression effect. Even on hot days, it effectively releases unpleasant stuffiness and feels refreshing. The structure efficiently transfers the load to the hips, providing a high level of fit, making it comfortable to wear for long periods without getting tired. ✅【High Safety & Multifunctionality】Reflective material that strongly reflects car lights is placed on the shoulder straps of the backpack, and nighttime visibility is up to 100m, ensuring safety when riding a bicycle or motorcycle at night. It also has the necessary functional features for a backpack. ① A holder in the front pocket for attaching keys (eliminates the hassle of searching for keys) ② A zippered pocket on the shoulder strap for storing transportation cards (allows you to pass through ticket gates without stopping) ③ A dedicated belt that can be attached to a suitcase (releases the shoulders with a carrier supporter)