1. Business Casual Laptop Backpack, Expandable Water Resistant Messenger Backpack, Versatile Polyester Laptop Case with Shoulder Strap for Men and Women, Suitable for Travel, Business, School 2. This modern and functional backpack is suitable for both business and everyday use. It is made of polyester and has water resistance, which can protect your laptop and other electronic equipment from moisture. 3. The expandable design provides extra space when needed, and the comfortable shoulder strap ensures comfort when carrying it over short or long distances. 4. This backpack is suitable for travel, business meetings or daily use at school. The classic and elegant design makes it fit for various occasions, and the universal color and style suit both men and women. 5. Various compartments and pockets ensure organization and convenience, so you can easily keep all your belongings at hand. 6. Choose this backpack and experience how comfort and style go together!