![Expandable Waterproof 40L Travel Backpack with USB, K-AROLE™️ - Organized storage for versatile travel essentials](http://k-arole.com/cdn/shop/files/Sd7aba85f24c441d8b726294aac1d2e845.webp?v=1716569795&width=320)
![Expandable Waterproof 40L Travel Backpack with USB K-AROLE™️ - Convenient capacity expansion design, unzippable layer for easy expansion, can hold 3-4 days of clothing.](http://k-arole.com/cdn/shop/files/S69ec27f067fc45c9bb7456053df300feA.webp?v=1716569795&width=320)
Expandable and Spacious:
The backpack can expand up to 40L, providing ample space for your travel essentials.Waterproof Material: Made from waterproof nylon material, this backpack keeps your belongings safe and dry in any weather condition.
Durable Backpack:
- The travel backpack is made of water-resistant polyester, with good breathability and heat dissipation. It features two padded shoulder straps for lightweight carrying and strength reinforcement, relieving shoulder pressure and keeping you cool during long use.
![Beige expandable waterproof 40L travel backpack with USB charging and headphones port displayed on a desk with laptop and phone](http://k-arole.com/cdn/shop/files/S5871d1ca56f342949b16296850166620D.webp?v=1716569796&width=320)
USB Charging Port:
With a built-in charging port, it allows you to charge your phone anytime and anywhere. With a USB port, you can easily charge your laptop or other devices while on the go.
![Expandable Waterproof 40L Travel Backpack with USB, Flight-approved carry-on bag, Fits overhead bin and under seat](http://k-arole.com/cdn/shop/files/S14228a603f7b483abbc944a8ac7a211c4.webp?v=1716569795&width=320)
Flight Approved Carry-On:
The overall size meets airline size standards, and the portable zipper opening makes it easy to quickly pass through airport security checks.
![Expandable Waterproof 40L Travel Backpack with USB K-AROLE™️ - Breathable, durable, and comfortable backpack with adjustable straps, fixed chest buckle, and reinforced design for convenient travel.](http://k-arole.com/cdn/shop/files/Se561f429fd4d4ba6814f866b3b9ba7a5b.webp?v=1716569795&width=320)
Arcuate Shoulder Strap
The backpack comes with an arcuate shoulder strap that evenly distributes weight for comfortable use.
![Expandable Waterproof 40L Travel Backpack with USB K-AROLE™️ - Versatile storage solution for 4-6 days of travel, featuring laptop compartment, wet pocket, and multiple organizational pockets.](http://k-arole.com/cdn/shop/files/S42f46370af6246c89bba1a2076d67687f.webp?v=1716569796&width=320)
Expandable Design:
Before expansion, the capacity is 28L with dimensions of 17.7x13x4 inches; after expansion, the capacity is 40L with dimensions of 17.7x13x8.7 inches. Ideal for 3-5 days of daily travel.
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- Multifunctional Anti-Theft Backpack: Includes a zippered pocket on the back to store valuables like mobile phones and iPads, providing anti-theft protection and convenience. It can serve as a daily backpack, spacious college backpack, professional laptop backpack, or everyday use backpack for weekend getaways.
- Multi-Compartment Design and Wet Bag: Includes 3 main pockets, 2 laptop compartments (suitable for a 15.6" tablet and a 17" laptop, respectively), and many other pockets for different purposes. The wet bag is made of high-density waterproof material to help separate dry and wet items. If you have wet clothes or a towel, you can put them in the wet bag.
FAQ
Q1: What is the capacity of the backpack?
A1: The backpack can expand up to 40L, making it spacious enough to hold all your travel essentials. Before expansion, the capacity is 28L with dimensions of 17.7x13x4 inches; after expansion, it is 40L with dimensions of 17.7x13x8.7 inches.
Q2: Is the backpack waterproof?
A2: Yes, the backpack is made from waterproof nylon material, ensuring that your belongings stay safe and dry in any weather condition.Q3: Does the backpack have a USB charging port?
A3: Yes, the backpack features a built-in USB port, allowing you to easily charge your laptop or other devices while on the go.
Q4: Is the backpack comfortable to wear for long periods?
A4: Absolutely. The backpack comes with arcuate shoulder straps that evenly distribute weight, along with padded shoulder straps for added comfort. The breathable and heat-dissipating materials also help keep you cool during extended use.
Q5: Is the backpack suitable for air travel?
A5: Yes, the overall size of the backpack meets airline size standards, making it a perfect carry-on. The portable zipper opening allows for quick and easy airport security checks..