Mark Ryden Expandable Travel Backpack, 41L Waterproof, Airline Approved, USB Charging Port

Expandable Large Capacity: Compressed capacity of 26L, full-expansion zipper creates 30% percent more packing space, capacity of up to 38L, total of three layers USB Charging Port Design: The usb backpack comes with a charging port you can link your phone to and easily charge during outdoors and travel. Place your power bank inside the bag and connect your phone to the outer port ( built-in charging cable inside ). Please note that this travel bag doesn't power itself, usb charging port only provides easy access to charge Multi-functional Design: A business backpack with a back U-shaped three-dimensional ventilation design helps with air convection, ventilation, and heat elimination. Wide breathable mesh shoulder straps and back with plentiful sponge pads help relieve the stress from your shoulder. The back of the backpack luggage strap design makes the journey easier. In addition, there are anti-theft pocket designs, shoulder straps non-slip buckle designs, side buckle designs, etc High-Quality SBS Zippers: Smooth two-way zippers are a very important component of the men's and women's casual daypack backpack, which are made of heavy-duty metal material, wear-resistant, anti-oxidated, and easy to slide and work smoothly. The zipper pull tabs are durable, good-sized, and elegant in design Water Resistant Backpack: The computer backpack is made of Oxford fabric with high-density nylon lining, which has good waterproof performance, protects your belongings from splashing water and rain Specifications: Colors: Black Weight: 2.87 lb / 1.30 kg Fabric: Oxford + Nylon + PU Normal Size: 11.8 x 7.0 x 17.7-inch Extended Size: 11.8 x 10.6 x 17.7 inch"