Business Large Extended 17 Inch PC Laptop USB Charging Water For Business Stylish [SUNOGE] Backpack, Rucksack, Backpack, Rucksack, Capacity, 3-Way

[Large capacity] Size: 48*32*17cm (before expansion: 22L)/48*32*29cm (after expansion: 37L); Can be carried on board. It can hold a 17-inch laptop, A4 size documents, and 2-3 days worth of clothes. It also has a carry-on function, which is essential for business trips and travel. [Excellent Waterproof Performance] The surface is made of durable high-density Oxford waterproof fabric, which prevents rain from penetrating into the bag and keeps out water droplets and dirt caused by rain. Added dry and wet separation pockets to easily separate dry and wet clothes. [Multi-functional and improved safety] Equipped with an external USB port and a hidden pocket to prevent theft. If you connect it to your mobile device in your backpack, you can charge your smartphone while carrying it on your back. The included cable is removable, making it safe to wash. [Compatible Ergonomics] Equipped with a gusset expansion function, it can be used according to the load. The bag uses a chest belt and S-shaped scientifically loaded shoulder straps. Effectively distributes the burden on your shoulders and back, reduces the pressure when carrying it on your back, and prevents shoulder slippage. [3WAY Business Bag] Introducing a popular bag that combines amazing storage capacity and convenience of use! It has a 3-way design (backpack, horizontal handbag, vertical handbag type) and can be used in a variety of situations such as commuting, business trips, school, and travel. business backpack