FENRUIEN Hard Shell Backpack, Waterproof, TSA Lock, Anti-Theft, Large Capacity, Expandable Capacity, Fits 15-17 Inch Laptops, Lightweight, USB

[Fully Waterproof Hard Shell] Don't panic if a sudden rain shower hits. The backpack's outer shell is made of aircraft-grade PC and ABS material, while the rest of the backpack is covered in high-density Oxford fabric, ensuring guaranteed waterproof performance. Even if you're caught in a sudden downpour, you won't have to worry about your important documents or laptop getting wet. The back features a 3D honeycomb mesh structure and generously built-in extra-thick sponge cushioning. Airflow is ensured, preventing back sweat even on crowded trains in the middle of summer. It also significantly reduces shoulder strain, making it comfortable to carry even heavy luggage. [USB Charging x Password Lock] Solves all your on-the-go problems. This backpack's USB charging port on the side lets you charge while walking or on the train. You'll never miss an important call. The built-in charging cable means you don't have to worry about forgetting it. You don't need to carry your luggage when you go to the restroom at a cafe. The 3-digit password lock gives you peace of mind when you leave your seat for a short time. You don't have to worry about losing your key, and you can set it to any number you like, making it easy to use. Plus, it comes with a strap that can be attached to the handle of a carry-on suitcase, making airport travel a breeze. [27L → 32L expansion system] This one backpack is all you need for weekdays and weekends. This large-capacity backpack is slim for weekdays and offers ample storage for business trips. Its smart 27L size is perfect for everyday use, but when traveling or on business, simply open the expansion zipper to quickly expand to a massive 32L! It even fits a change of clothes, making this a one-to-two-night trip. It can easily accommodate a large 17.3-inch laptop. The dedicated laptop pocket is padded with shock absorption to keep your valuable laptop securely protected. There's also a separate pocket for a 9.7-inch iPad, allowing you to organize your devices and access them easily. [Ultimate Organization] Free yourself from the stress of searching for things every day. This backpack's main compartment is large enough to hold work documents and a change of clothes. Its various pockets allow you to keep small items like chargers, earphones, business card holders, and pens in a designated place. Keep your important things safer. Keep your everyday essentials more convenient. The interior anti-theft pocket keeps your wallet and passport safe. The side pockets easily fit a 500ml water bottle or folding umbrella. The backpack's layout allows you to quickly access items when you need them, minimizing the stress of everyday use. [Sophisticated Design x Reliable Warranty] Looks great, functions great, and feels great. This backpack's futuristic hard-shell design complements both suits and casual outfits. Its tech-forward exterior will make you stand out from the crowd. It also comes with a one-year warranty for peace of mind in the unlikely event of a malfunction. Any defects or damage caused by normal use will be replaced or refunded within one year from the date of purchase. Because it's something you use every day, we've focused on quality and after-sales service to ensure you can use it for a long time with peace of mind.