Asenlin Travel Backpack for Women Men，40L-50L Expandable Carry on Backpack，17 Inch Water Resistant Laptop Backpack for Weekender Overnight Extre Large Backpack-Black
【Expandable & Super Large Capacity】： This large travel backpack has an expandable design that gives you a larger capacity, 45L before expansion and up to about 55L after expansion. unzip for more storage space and you can easily fit 3-5 days of travel supplies.【Size and material】: Travel backpack size is 18.8 * 12.2 * 8.2 inches, and has a special pocket that can accommodate a 18.3 inch laptop. The backpack can be fixed on the trunk rod or can be carried by hand; it uses high-quality water-resistant polyester oxford cloth material and explosion-proof zippers.【Upgrade and Reinforcement】: This model has been upgraded many times. We use multiple materials for multiple tests to ensure first-class. We strengthened the size of the fragile parts and adjusted the size of the center of gravity to make it easier to use for a long time, and refer to the actual experience of detailed design to optimize, reliable and ensure long-term use.【Ingenious Structure】: Main luggage bag + laptop special bag + front small bag + water bottle / umbrella bag mouth + hidden shoulder strap design + front panel night travel reflective seat belt.【Application】: Travel, carry around, weekend travel, cross-border travel, overnight, suitcase, easy-to-use for you to compress into a smaller backpack without carrying luggage, into a smaller backpack.